diff --git a/frontend/src/components/common/AvatarStack.vue b/frontend/src/components/common/AvatarStack.vue
new file mode 100644
index 0000000..7d6b9ee
--- /dev/null
+++ b/frontend/src/components/common/AvatarStack.vue
@@ -0,0 +1,205 @@
+<script setup lang="ts">
+// 아바타 스택 + 오버플로(+N) + 클릭 팝오버 목록 공용 컴포넌트.
+// 좁은 영역에서 다수의 사람(참석자/담당자 등)을 컴팩트하게 표시하고,
+// 클릭하면 전체 목록(아바타 + 이름 + 선택적 보조문구 sub)을 펼친다.
+import { computed, ref } from 'vue'
+import UserAvatar from '@/components/UserAvatar.vue'
+import { useClickOutside } from '@/composables/useClickOutside'
+
+interface StackPerson {
+  id: string
+  name: string
+  avatarUrl?: string | null
+  // 팝오버 목록의 이름 아래 보조문구(예: 역할). 없으면 표시 안 함
+  sub?: string | null
+}
+const props = withDefaults(
+  defineProps<{ people: StackPerson[]; max?: number }>(),
+  { max: 6 },
+)
+
+const open = ref(false)
+const rootRef = ref<HTMLElement | null>(null)
+useClickOutside(open, () => (open.value = false), [rootRef], { esc: false })
+
+// max 초과 시 (max-1)개만 보이고 나머지는 +N
+const shown = computed(() =>
+  props.people.length > props.max
+    ? props.people.slice(0, props.max - 1)
+    : props.people,
+)
+const extra = computed(() =>
+  props.people.length > props.max ? props.people.length - (props.max - 1) : 0,
+)
+</script>
+
+<template>
+  <div
+    ref="rootRef"
+    class="as"
+  >
+    <button
+      type="button"
+      class="as-trigger"
+      :class="{ open }"
+      @click="open = !open"
+    >
+      <span class="as-stack">
+        <span
+          v-for="p in shown"
+          :key="p.id"
+          class="as-av"
+        ><UserAvatar
+          :url="p.avatarUrl"
+          :name="p.name"
+        /></span>
+        <span
+          v-if="extra > 0"
+          class="as-more"
+        >+{{ extra }}</span>
+      </span>
+      <span class="as-chev">
+        <svg
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          stroke-width="2"
+          stroke-linecap="round"
+          stroke-linejoin="round"
+        ><path d="m6 9 6 6 6-6" /></svg>
+      </span>
+    </button>
+    <div
+      v-if="open"
+      class="as-panel"
+    >
+      <div
+        v-for="p in people"
+        :key="p.id"
+        class="as-prow"
+      >
+        <span class="as-av sm"><UserAvatar
+          :url="p.avatarUrl"
+          :name="p.name"
+        /></span>
+        <span class="as-pinfo">
+          <span class="as-pnm">{{ p.name }}</span>
+          <span
+            v-if="p.sub"
+            class="as-psub"
+          >{{ p.sub }}</span>
+        </span>
+      </div>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.as {
+  position: relative;
+  display: inline-block;
+}
+.as-trigger {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.5625rem;
+  border: none;
+  background: none;
+  cursor: pointer;
+  padding: 0.3125rem 0.5rem 0.3125rem 0.3125rem;
+  margin: -0.3125rem -0.5rem -0.3125rem -0.3125rem;
+  border-radius: 0.5625rem;
+}
+.as-trigger:hover,
+.as-trigger.open {
+  background: #f1f2f4;
+}
+.as-stack {
+  display: inline-flex;
+  align-items: center;
+}
+.as-av {
+  width: 1.875rem;
+  height: 1.875rem;
+  border-radius: 50%;
+  flex-shrink: 0;
+}
+.as-stack .as-av,
+.as-stack .as-more {
+  margin-left: -0.5625rem;
+  box-shadow: 0 0 0 2px var(--panel);
+}
+.as-stack .as-av:first-child {
+  margin-left: 0;
+}
+.as-more {
+  width: 1.875rem;
+  height: 1.875rem;
+  border-radius: 50%;
+  display: grid;
+  place-items: center;
+  font-size: 0.75rem;
+  font-weight: 700;
+  background: #eceef1;
+  color: var(--text-2);
+  flex-shrink: 0;
+}
+.as-chev {
+  color: var(--text-3);
+  display: grid;
+  transition: transform 0.15s ease;
+}
+.as-chev svg {
+  width: 0.9375rem;
+  height: 0.9375rem;
+}
+.as-trigger.open .as-chev {
+  transform: rotate(180deg);
+}
+.as-panel {
+  position: absolute;
+  top: calc(100% + 0.375rem);
+  left: 0;
+  min-width: 12.5rem;
+  max-width: 16.25rem;
+  max-height: 15rem;
+  overflow-y: auto;
+  z-index: 20;
+  background: var(--panel);
+  border: 1px solid var(--border);
+  border-radius: 0.625rem;
+  box-shadow: var(--shadow-pop);
+  padding: 0.3125rem;
+}
+.as-prow {
+  display: flex;
+  align-items: center;
+  gap: 0.5625rem;
+  padding: 0.375rem 0.5rem;
+  border-radius: 0.375rem;
+  white-space: nowrap;
+}
+.as-prow:hover {
+  background: #f4f5f7;
+}
+.as-av.sm {
+  width: 1.5rem;
+  height: 1.5rem;
+}
+.as-pinfo {
+  display: flex;
+  flex-direction: column;
+  min-width: 0;
+}
+.as-pnm {
+  font-size: 0.8125rem;
+  font-weight: 600;
+  color: var(--text);
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.as-psub {
+  font-size: 0.719rem;
+  color: var(--text-3);
+}
+</style>
diff --git a/frontend/src/components/schedule/ScheduleAvatar.vue b/frontend/src/components/schedule/ScheduleAvatar.vue
deleted file mode 100644
index 79fd58c..0000000
--- a/frontend/src/components/schedule/ScheduleAvatar.vue
+++ /dev/null
@@ -1,38 +0,0 @@
-<script setup lang="ts">
-// 일정 참석자 아바타 — 사이트 공용 UserAvatar 를 size(px)로 감싸는 얇은 어댑터.
-// 렌더링(이미지/실루엣)은 UserAvatar 가 단일 책임지고, 여기선 크기/원형 래퍼만 담당.
-// (.sa 클래스는 상세 패널 아바타 스택 CSS 의 훅으로 유지)
-// size 는 px 로 받되 rem(÷16)으로 렌더 — 앱 전체 rem 스케일과 정합.
-import { computed } from 'vue'
-import UserAvatar from '@/components/UserAvatar.vue'
-
-const props = withDefaults(
-  defineProps<{
-    name?: string
-    avatarUrl?: string | null
-    size?: number
-  }>(),
-  { name: '', avatarUrl: null, size: 21 },
-)
-const dim = computed(() => `${props.size / 16}rem`)
-</script>
-
-<template>
-  <span
-    class="sa"
-    :style="{ width: dim, height: dim }"
-  >
-    <UserAvatar
-      :url="avatarUrl"
-      :name="name"
-    />
-  </span>
-</template>
-
-<style scoped>
-.sa {
-  display: block;
-  flex-shrink: 0;
-  border-radius: 50%;
-}
-</style>
diff --git a/frontend/src/components/schedule/ScheduleDetailPanel.vue b/frontend/src/components/schedule/ScheduleDetailPanel.vue
index 734ec6a..66d2eb1 100644
--- a/frontend/src/components/schedule/ScheduleDetailPanel.vue
+++ b/frontend/src/components/schedule/ScheduleDetailPanel.vue
@@ -1,8 +1,7 @@
 <script setup lang="ts">
 // 우측 슬라이드 상세 패널 — 선택 일정의 시간/장소/참석자/메모 + 수정·삭제
 import { computed, ref, watch } from 'vue'
-import { useClickOutside } from '@/composables/useClickOutside'
-import ScheduleAvatar from './ScheduleAvatar.vue'
+import AvatarStack from '@/components/common/AvatarStack.vue'
 import { eventDateText, spanDays } from '@/shared/utils/scheduleDate'
 import type { ApiScheduleCategory, ApiScheduleEvent } from '@/types/schedule'
 
@@ -34,21 +33,7 @@ const dur = computed(() =>
   ev.value && multi.value ? spanDays(ev.value.start, ev.value.end) : 0,
 )
 
-// 참석자 스택 토글
-const attOpen = ref(false)
-const attRef = ref<HTMLElement | null>(null)
-useClickOutside(attOpen, () => (attOpen.value = false), [attRef], { esc: false })
-
-const MAX = 6
 const attendees = computed(() => ev.value?.attendees ?? [])
-const shownAtt = computed(() =>
-  attendees.value.length > MAX
-    ? attendees.value.slice(0, MAX - 1)
-    : attendees.value,
-)
-const extra = computed(() =>
-  attendees.value.length > MAX ? attendees.value.length - (MAX - 1) : 0,
-)
 </script>
 
 <template>
@@ -122,57 +107,10 @@ const extra = computed(() =>
             <span class="dt-k">참석자</span>
             <span class="dt-v">
               <template v-if="ev.allHands">전 직원 대상</template>
-              <div
+              <AvatarStack
                 v-else-if="attendees.length > 0"
-                ref="attRef"
-                class="att-stack"
-              >
-                <button
-                  class="att-trigger"
-                  :class="{ open: attOpen }"
-                  @click="attOpen = !attOpen"
-                >
-                  <span class="avstack">
-                    <ScheduleAvatar
-                      v-for="p in shownAtt"
-                      :key="p.id"
-                      :name="p.name"
-                      :avatar-url="p.avatarUrl"
-                      :size="30"
-                    />
-                    <span
-                      v-if="extra > 0"
-                      class="av-more"
-                    >+{{ extra }}</span>
-                  </span>
-                  <span class="att-chev">
-                    <svg
-                      viewBox="0 0 24 24"
-                      fill="none"
-                      stroke="currentColor"
-                      stroke-width="2"
-                      stroke-linecap="round"
-                      stroke-linejoin="round"
-                    ><path d="m6 9 6 6 6-6" /></svg>
-                  </span>
-                </button>
-                <div
-                  v-if="attOpen"
-                  class="att-panel"
-                >
-                  <div
-                    v-for="p in attendees"
-                    :key="p.id"
-                    class="att-row"
-                  >
-                    <ScheduleAvatar
-                      :name="p.name"
-                      :avatar-url="p.avatarUrl"
-                      :size="24"
-                    />{{ p.name }}
-                  </div>
-                </div>
-              </div>
+                :people="attendees"
+              />
               <template v-else>참석자 없음</template>
             </span>
           </div>
@@ -347,90 +285,6 @@ const extra = computed(() =>
   line-height: 1.7;
   white-space: pre-wrap;
 }
-.att-stack {
-  position: relative;
-  margin: -0.1875rem 0;
-}
-.att-trigger {
-  display: inline-flex;
-  align-items: center;
-  gap: 0.5625rem;
-  border: none;
-  background: none;
-  cursor: pointer;
-  padding: 0.3125rem 0.5rem 0.3125rem 0.3125rem;
-  margin: -0.3125rem -0.5rem -0.3125rem -0.3125rem;
-  border-radius: 0.5625rem;
-}
-.att-trigger:hover,
-.att-trigger.open {
-  background: #f1f2f4;
-}
-.avstack {
-  display: inline-flex;
-  align-items: center;
-}
-.avstack :deep(.sa),
-.avstack .av-more {
-  margin-left: -0.5625rem;
-  box-shadow: 0 0 0 2px var(--panel);
-}
-.avstack :deep(.sa):first-child {
-  margin-left: 0;
-}
-.av-more {
-  width: 1.875rem;
-  height: 1.875rem;
-  border-radius: 50%;
-  display: grid;
-  place-items: center;
-  font-size: 0.75rem;
-  font-weight: 700;
-  background: #eceef1;
-  color: var(--text-2);
-  flex-shrink: 0;
-}
-.att-chev {
-  color: var(--text-3);
-  display: grid;
-  transition: transform 0.15s ease;
-}
-.att-chev svg {
-  width: 0.9375rem;
-  height: 0.9375rem;
-}
-.att-trigger.open .att-chev {
-  transform: rotate(180deg);
-}
-.att-panel {
-  position: absolute;
-  top: calc(100% + 0.375rem);
-  left: 0;
-  min-width: 12.5rem;
-  max-width: 16.25rem;
-  max-height: 15rem;
-  overflow-y: auto;
-  z-index: 20;
-  background: var(--panel);
-  border: 1px solid var(--border);
-  border-radius: 0.625rem;
-  box-shadow: var(--shadow-md);
-  padding: 0.3125rem;
-}
-.att-row {
-  display: flex;
-  align-items: center;
-  gap: 0.5625rem;
-  font-size: 0.8125rem;
-  font-weight: 500;
-  color: var(--text);
-  padding: 0.375rem 0.5rem;
-  border-radius: 0.375rem;
-  white-space: nowrap;
-}
-.att-row:hover {
-  background: #f4f5f7;
-}
 .dt-foot {
   flex-shrink: 0;
   padding: 0.875rem 1.375rem;
diff --git a/frontend/src/components/schedule/ScheduleEventModal.vue b/frontend/src/components/schedule/ScheduleEventModal.vue
index 72098b5..d94ce02 100644
--- a/frontend/src/components/schedule/ScheduleEventModal.vue
+++ b/frontend/src/components/schedule/ScheduleEventModal.vue
@@ -2,8 +2,7 @@
 // 일정 생성/수정 모달
 import { computed, ref, watch } from 'vue'
 import BaseModal from '@/components/common/BaseModal.vue'
-import { useClickOutside } from '@/composables/useClickOutside'
-import ScheduleAvatar from './ScheduleAvatar.vue'
+import UserAvatar from '@/components/UserAvatar.vue'
 import type {
   ApiScheduleCategory,
   ApiScheduleEvent,
@@ -71,29 +70,46 @@ const valid = computed(
     !!startT.value,
 )
 
-// 참석자 멀티셀렉트
-const msOpen = ref(false)
-const msRef = ref<HTMLElement | null>(null)
-const msLabel = computed(() => {
-  if (allHands.value) return '전 직원'
-  if (attendeeIds.value.length === 0) return '참석자 선택'
+// 참석자 — 검색 입력 + 후보 드롭다운 + 선택 칩 (업무 생성의 담당자 등록과 동일 방식)
+const attendeeQuery = ref('')
+const showAttendeeDropdown = ref(false)
+// 선택된 참석자(칩 표시용)
+const selectedAttendees = computed(() =>
+  attendeeIds.value
+    .map((id) => props.people.find((p) => p.id === id))
+    .filter((p): p is ApiSchedulePerson => !!p),
+)
+// 후보 = 미선택 사용자, 이름 검색 필터
+const attendeeCandidates = computed(() => {
+  const selected = new Set(attendeeIds.value)
+  const kw = attendeeQuery.value.trim()
   return props.people
-    .filter((p) => attendeeIds.value.includes(p.id))
-    .map((p) => p.name)
-    .join(', ')
+    .filter((p) => !selected.has(p.id))
+    .filter((p) => !kw || p.name.includes(kw))
 })
-function toggleAll(): void {
-  allHands.value = !allHands.value
-  if (allHands.value) attendeeIds.value = []
-}
-function togglePerson(id: string): void {
+function addAttendee(id: string): void {
   allHands.value = false
-  attendeeIds.value = attendeeIds.value.includes(id)
-    ? attendeeIds.value.filter((x) => x !== id)
-    : [...attendeeIds.value, id]
+  if (!attendeeIds.value.includes(id)) {
+    attendeeIds.value = [...attendeeIds.value, id]
+  }
+  attendeeQuery.value = ''
+}
+function removeAttendee(id: string): void {
+  attendeeIds.value = attendeeIds.value.filter((x) => x !== id)
+}
+function selectAllHands(): void {
+  allHands.value = true
+  attendeeIds.value = []
+  attendeeQuery.value = ''
+  showAttendeeDropdown.value = false
+}
+function clearAllHands(): void {
+  allHands.value = false
+}
+function onAttendeeBlur(): void {
+  // 항목은 @mousedown.prevent 로 선택하므로 약간 지연 후 닫는다
+  setTimeout(() => (showAttendeeDropdown.value = false), 120)
 }
-// 참석자 멀티셀렉트 바깥클릭 닫기(ESC 는 모달 닫기에서 처리)
-useClickOutside(msOpen, () => (msOpen.value = false), [msRef], { esc: false })
 
 function submit(): void {
   if (!valid.value) return
@@ -121,7 +137,7 @@ function submit(): void {
       <input
         v-model="title"
         class="form-input"
-        placeholder="일정 제목"
+        placeholder="일정 제목을 입력하세요"
         autofocus
       >
     </label>
@@ -188,23 +204,22 @@ function submit(): void {
       <input
         v-model="place"
         class="form-input"
-        placeholder="장소 또는 화상"
+        placeholder="장소를 입력하세요"
       >
     </label>
     <div class="form-field">
       <span class="form-label">참석자</span>
-      <div
-        ref="msRef"
-        class="ms"
-      >
-        <button
-          type="button"
-          class="ms-field"
-          :class="{ empty: !allHands && attendeeIds.length === 0, open: msOpen }"
-          @click="msOpen = !msOpen"
-        >
-          <span class="ms-val">{{ msLabel }}</span>
-          <span class="chev">
+      <div class="combo">
+        <div class="combo-field">
+          <input
+            v-model="attendeeQuery"
+            class="combo-input"
+            placeholder="참석자를 검색하세요"
+            autocomplete="off"
+            @focus="showAttendeeDropdown = true"
+            @blur="onAttendeeBlur"
+          >
+          <span class="combo-caret">
             <svg
               viewBox="0 0 24 24"
               fill="none"
@@ -214,76 +229,82 @@ function submit(): void {
               stroke-linejoin="round"
             ><path d="m6 9 6 6 6-6" /></svg>
           </span>
-        </button>
+        </div>
+        <!-- 참석자 후보 드롭다운 -->
         <div
-          v-if="msOpen"
-          class="ms-panel"
+          v-if="showAttendeeDropdown"
+          class="assignee-dd"
         >
+          <!-- 전 직원(전체 대상) -->
           <button
+            v-if="!allHands && !attendeeQuery.trim()"
             type="button"
-            class="ms-item"
-            :class="{ on: allHands }"
-            @click="toggleAll"
+            class="assignee-dd-item"
+            @mousedown.prevent="selectAllHands"
           >
-            <span class="ms-all">전</span>
-            <span class="ms-name">전 직원</span>
-            <span
-              v-if="allHands"
-              class="ms-check"
-            >
-              <svg
-                viewBox="0 0 24 24"
-                fill="none"
-                stroke="currentColor"
-                stroke-width="2.4"
-                stroke-linecap="round"
-                stroke-linejoin="round"
-              ><path d="M20 6 9 17l-5-5" /></svg>
-            </span>
+            <span class="ad-all">전</span>
+            <span class="ad-nm">전 직원</span>
           </button>
-          <div class="ms-div" />
           <button
-            v-for="p in people"
+            v-for="p in attendeeCandidates"
             :key="p.id"
             type="button"
-            class="ms-item"
-            :class="{ on: attendeeIds.includes(p.id) }"
-            @click="togglePerson(p.id)"
+            class="assignee-dd-item"
+            @mousedown.prevent="addAttendee(p.id)"
           >
-            <ScheduleAvatar
+            <span class="avatar"><UserAvatar
+              :url="p.avatarUrl"
               :name="p.name"
-              :avatar-url="p.avatarUrl"
-              :size="20"
-            />
-            <span class="ms-name">{{ p.name }}</span>
-            <span
-              v-if="attendeeIds.includes(p.id)"
-              class="ms-check"
-            >
-              <svg
-                viewBox="0 0 24 24"
-                fill="none"
-                stroke="currentColor"
-                stroke-width="2.4"
-                stroke-linecap="round"
-                stroke-linejoin="round"
-              ><path d="M20 6 9 17l-5-5" /></svg>
-            </span>
+            /></span>
+            <span class="ad-nm">{{ p.name }}</span>
           </button>
           <div
-            v-if="people.length === 0"
-            class="ms-empty"
+            v-if="attendeeCandidates.length === 0 && (allHands || attendeeQuery.trim())"
+            class="assignee-dd-msg"
           >
-            등록된 사용자가 없습니다
+            {{ people.length === 0 ? '등록된 사용자가 없습니다.' : '추가할 사용자가 없습니다.' }}
           </div>
         </div>
       </div>
+      <!-- 선택된 참석자 칩 -->
+      <div
+        v-if="allHands || selectedAttendees.length"
+        class="assignee-chips"
+      >
+        <span
+          v-if="allHands"
+          class="chip"
+        >
+          <span class="ad-all sm">전</span>전 직원
+          <span
+            class="x"
+            @click="clearAllHands"
+          >×</span>
+        </span>
+        <template v-else>
+          <span
+            v-for="p in selectedAttendees"
+            :key="p.id"
+            class="chip"
+          >
+            <span class="avatar"><UserAvatar
+              :url="p.avatarUrl"
+              :name="p.name"
+            /></span>
+            {{ p.name }}
+            <span
+              class="x"
+              @click="removeAttendee(p.id)"
+            >×</span>
+          </span>
+        </template>
+      </div>
     </div>
     <label class="form-field"><span class="form-label">설명</span>
       <textarea
         v-model="desc"
         class="form-input form-textarea"
-        placeholder="메모"
+        placeholder="일정에 대한 메모를 입력하세요 (선택)"
         rows="3"
       />
     </label>
@@ -322,123 +343,146 @@ function submit(): void {
   color: var(--text-3);
 }
 
-/* 참석자 멀티셀렉트 */
-.ms {
+/* 참석자 — 업무 생성의 담당자 등록과 동일한 콤보(검색 입력 + 후보 드롭다운 + 선택 칩) */
+.combo {
   position: relative;
 }
-.ms-field {
+.combo-field {
   display: flex;
+  flex-wrap: wrap;
   align-items: center;
-  gap: 0.5rem;
-  width: 100%;
-  height: 2.5rem;
-  padding: 0 0.625rem 0 0.75rem;
+  gap: 0.375rem;
+  padding: 0.4375rem 0.5rem;
   border: 1px solid var(--border-strong);
   border-radius: var(--radius);
   background: #fff;
-  font-family: inherit;
-  font-size: 0.844rem;
-  color: var(--text);
-  cursor: pointer;
-  text-align: left;
 }
-.ms-field.empty .ms-val {
-  color: var(--text-3);
-}
-.ms-field.open {
+.combo-field:focus-within {
   border-color: var(--accent);
   box-shadow: 0 0 0 3px var(--accent-weak);
 }
-.ms-field .ms-val {
+.combo-input {
   flex: 1;
-  min-width: 0;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
+  min-width: 4.375rem;
+  border: none;
+  outline: none;
+  font-family: inherit;
+  font-size: 0.8125rem;
+  padding: 0.25rem 0.125rem;
+  background: transparent;
+  color: var(--text);
 }
-.ms-field .chev {
-  display: grid;
+.combo-input::placeholder {
   color: var(--text-3);
 }
-.ms-field .chev svg {
-  width: 0.9375rem;
-  height: 0.9375rem;
+.combo-caret {
+  color: var(--text-3);
+  display: grid;
+  place-items: center;
+  margin-left: auto;
+  flex-shrink: 0;
 }
-.ms-panel {
+.combo-caret svg {
+  width: 1rem;
+  height: 1rem;
+}
+.assignee-dd {
   position: absolute;
   top: calc(100% + 0.375rem);
   left: 0;
   right: 0;
   z-index: 10;
-  max-height: 13.75rem;
-  overflow-y: auto;
   background: #fff;
   border: 1px solid var(--border);
   border-radius: 0.5625rem;
   box-shadow: var(--shadow-pop);
   padding: 0.375rem;
+  max-height: 14rem;
+  overflow-y: auto;
 }
-.ms-item {
+.assignee-dd-item {
   display: flex;
   align-items: center;
   gap: 0.5rem;
   width: 100%;
-  border: none;
-  background: none;
-  font-family: inherit;
-  font-size: 0.8125rem;
-  font-weight: 600;
-  color: var(--text-2);
   padding: 0.4375rem 0.5rem;
+  border: none;
+  background: transparent;
   border-radius: var(--radius-sm);
   cursor: pointer;
+  font-family: inherit;
   text-align: left;
 }
-.ms-item:hover {
+.assignee-dd-item:hover {
   background: #f5f6f8;
 }
-.ms-item.on {
-  color: var(--text);
+.assignee-dd-item .avatar {
+  width: 1.5rem;
+  height: 1.5rem;
+  flex-shrink: 0;
 }
-.ms-item .ms-name {
-  flex: 1;
-  min-width: 0;
-  overflow: hidden;
-  text-overflow: ellipsis;
+.ad-nm {
+  font-size: 0.8125rem;
+  font-weight: 600;
+  color: var(--text);
   white-space: nowrap;
 }
-.ms-item .ms-check {
+.assignee-dd-msg {
+  padding: 0.625rem 0.5rem;
+  font-size: 0.75rem;
+  color: var(--text-3);
+  text-align: center;
+}
+.assignee-chips {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.375rem;
+  margin-top: 0.5rem;
+}
+.chip {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.375rem;
+  background: #f1f2f4;
+  border: 1px solid var(--border);
+  border-radius: 20px;
+  padding: 0.1875rem 0.5rem 0.1875rem 0.1875rem;
+  font-size: 0.781rem;
+  font-weight: 600;
+  color: var(--text);
+  white-space: nowrap;
+}
+.chip .avatar {
+  width: 1.375rem;
+  height: 1.375rem;
   flex-shrink: 0;
-  color: var(--accent);
-  display: grid;
-  place-items: center;
 }
-.ms-item .ms-check svg {
-  width: 0.9375rem;
-  height: 0.9375rem;
+.chip .x {
+  color: var(--text-3);
+  cursor: pointer;
+  font-size: 0.8125rem;
+  line-height: 1;
+  margin-left: 0.0625rem;
 }
-.ms-all {
-  /* 참석자 아바타(ScheduleAvatar :size="20" = 1.25rem)와 동일 크기 */
-  width: 1.25rem;
-  height: 1.25rem;
+.chip .x:hover {
+  color: var(--red);
+}
+/* 전 직원 표식(드롭다운/칩 공용) */
+.ad-all {
+  width: 1.5rem;
+  height: 1.5rem;
   border-radius: 50%;
   display: grid;
   place-items: center;
-  font-size: 0.5625rem;
+  font-size: 0.6875rem;
   font-weight: 700;
   color: #fff;
   background: #9298a3;
   flex-shrink: 0;
 }
-.ms-div {
-  height: 0.0625rem;
-  background: var(--border);
-  margin: 0.25rem 0.125rem;
-}
-.ms-empty {
-  padding: 0.75rem 0.5rem;
-  font-size: 0.781rem;
-  color: var(--text-3);
-  text-align: center;
+.ad-all.sm {
+  width: 1.375rem;
+  height: 1.375rem;
+  font-size: 0.625rem;
 }
 </style>
diff --git a/frontend/src/pages/relay/TaskDetailPage.vue b/frontend/src/pages/relay/TaskDetailPage.vue
index 1511035..d8f414f 100644
--- a/frontend/src/pages/relay/TaskDetailPage.vue
+++ b/frontend/src/pages/relay/TaskDetailPage.vue
@@ -29,6 +29,7 @@ import { useTaskStore } from '@/stores/task.store'
 import { useAuthStore } from '@/stores/auth.store'
 import { useDialog } from '@/composables/useDialog'
 import UserAvatar from '@/components/UserAvatar.vue'
+import AvatarStack from '@/components/common/AvatarStack.vue'
 import StatusSelect from '@/components/StatusSelect.vue'
 import { attachmentKindOf, fileBadge } from '@/shared/utils/format'
 import {
@@ -182,6 +183,15 @@ const assigneeNames = computed(() => {
   if (names.length === 1) return names[0]
   return `${names[0]} 외 ${names.length - 1}명`
 })
+// 담당자 아바타 스택용 — 팝오버에 역할(role)을 보조문구로 표시
+const assigneeStack = computed(() =>
+  (task.value?.assignees ?? []).map((a) => ({
+    id: a.id,
+    name: a.name,
+    avatarUrl: a.avatarUrl,
+    sub: a.role,
+  })),
+)
 // 수정 요청 모달 열기 — 모든 항목을 '완료'로 초기화(담당자가 완료를 주장하며 요청)
 function openChanges() {
   const checks: Record<string, boolean> = {}
@@ -1204,18 +1214,15 @@ function badgeFor(name: string | undefined): { label: string; cls: string } {
               <div class="side-label">
                 담당자 · {{ task.assignees.length }}명
               </div>
-              <div class="assignees">
-                <div
-                  v-for="a in task.assignees"
-                  :key="a.id"
-                  class="ass"
-                >
-                  <span class="avatar"><UserAvatar
-                    :url="a.avatarUrl"
-                    :name="a.name"
-                  /></span>
-                  <span><div class="nm">{{ a.name }}</div><div class="rl">{{ a.role }}</div></span>
-                </div>
+              <AvatarStack
+                v-if="task.assignees.length"
+                :people="assigneeStack"
+              />
+              <div
+                v-else
+                class="ass-empty"
+              >
+                지정된 담당자가 없습니다.
               </div>
             </div>
             <div class="side-field">
@@ -3154,30 +3161,9 @@ function badgeFor(name: string | undefined): { label: string; cls: string } {
 .status-badge.done .dot {
   background: var(--green);
 }
-.assignees {
-  display: flex;
-  flex-direction: column;
-  gap: 0.5625rem;
-}
-.ass {
-  display: flex;
-  align-items: center;
-  gap: 0.5625rem;
-}
-.ass .avatar {
-  width: 1.625rem;
-  height: 1.625rem;
-  font-size: 0.6875rem;
-}
-.ass .nm {
+.ass-empty {
   font-size: 0.8125rem;
-  font-weight: 600;
-  white-space: nowrap;
-}
-.ass .rl {
-  font-size: 0.719rem;
   color: var(--text-3);
-  white-space: nowrap;
 }
 .dl {
   display: flex;