diff --git a/frontend/src/components/schedule/ScheduleMonthGrid.vue b/frontend/src/components/schedule/ScheduleMonthGrid.vue
new file mode 100644
index 0000000..9be2302
--- /dev/null
+++ b/frontend/src/components/schedule/ScheduleMonthGrid.vue
@@ -0,0 +1,295 @@
+<script setup lang="ts">
+// 월간 달력 그리드 — 주(행) × 요일(열). 일정은 주 단위로 다중일 막대(span)로 배치하고,
+// 한 주에서 보이는 레인을 초과하면 해당 날짜 칸에 '+N' 으로 표기. 카테고리 색·유형 필터 반영.
+import { computed } from 'vue'
+import type { ApiScheduleCategory, ApiScheduleEvent } from '@/types/schedule'
+import type { MonthDay } from '@/shared/utils/scheduleDate'
+
+const props = defineProps<{
+  weeks: MonthDay[][]
+  events: ApiScheduleEvent[]
+  categories: ApiScheduleCategory[]
+  activeTypeIds: Set<string>
+  selId: string | null
+}>()
+const emit = defineEmits<{ (e: 'select', id: string): void }>()
+
+const WEEKDAYS = ['월', '화', '수', '목', '금', '토', '일']
+// 한 주에서 막대로 보일 최대 레인 수(초과분은 '+N')
+const VISIBLE_LANES = 3
+
+const colorMap = computed(() => {
+  const m: Record<string, string> = {}
+  for (const c of props.categories) m[c.id] = c.color
+  return m
+})
+const colorOf = (catId: string): string => colorMap.value[catId] ?? '#9298a3'
+const weakOf = (color: string): string => `color-mix(in srgb, ${color} 13%, #fff)`
+
+const visibleEvents = computed(() =>
+  props.events.filter((e) => props.activeTypeIds.has(e.categoryId)),
+)
+
+interface MBar {
+  ev: ApiScheduleEvent
+  startIdx: number
+  span: number
+  lane: number
+}
+interface LaidWeek {
+  week: MonthDay[]
+  items: MBar[]
+  moreByDay: number[]
+}
+
+// 주별로 일정을 클립(해당 주 범위)·정렬·레인 패킹
+const laidWeeks = computed<LaidWeek[]>(() =>
+  props.weeks.map((week) => {
+    const ws = week[0]?.iso ?? ''
+    const we = week[6]?.iso ?? ''
+    const cov = visibleEvents.value
+      .map((ev) => {
+        if (ev.end < ws || ev.start > we) return null
+        let startIdx = -1
+        let endIdx = -1
+        week.forEach((d, i) => {
+          if (d.iso >= ev.start && d.iso <= ev.end) {
+            if (startIdx < 0) startIdx = i
+            endIdx = i
+          }
+        })
+        if (startIdx < 0) return null
+        return { ev, startIdx, endIdx }
+      })
+      .filter((c): c is { ev: ApiScheduleEvent; startIdx: number; endIdx: number } => c !== null)
+      .sort(
+        (a, b) =>
+          a.startIdx - b.startIdx ||
+          String(a.ev.time).localeCompare(String(b.ev.time)),
+      )
+
+    const rowEnd: number[] = []
+    const items: MBar[] = []
+    const moreByDay = [0, 0, 0, 0, 0, 0, 0]
+    for (const it of cov) {
+      let r = 0
+      while (r < rowEnd.length && (rowEnd[r] ?? -1) >= it.startIdx) r++
+      rowEnd[r] = it.endIdx
+      if (r < VISIBLE_LANES) {
+        items.push({
+          ev: it.ev,
+          startIdx: it.startIdx,
+          span: it.endIdx - it.startIdx + 1,
+          lane: r,
+        })
+      } else {
+        for (let d = it.startIdx; d <= it.endIdx; d++)
+          moreByDay[d] = (moreByDay[d] ?? 0) + 1
+      }
+    }
+    return { week, items, moreByDay }
+  }),
+)
+</script>
+
+<template>
+  <div class="mg">
+    <div class="mg-head">
+      <div
+        v-for="(d, i) in WEEKDAYS"
+        :key="d"
+        class="mg-hd"
+        :class="{ weekend: i >= 5 }"
+      >
+        {{ d }}
+      </div>
+    </div>
+    <div class="mg-body">
+      <div
+        v-for="(wk, wi) in laidWeeks"
+        :key="wi"
+        class="mg-week"
+      >
+        <!-- 날짜 칸 배경(테두리/오늘/주말/이전·다음달) -->
+        <div
+          v-for="(d, di) in wk.week"
+          :key="'bg' + d.iso"
+          class="mg-bg"
+          :class="{ today: d.isToday, weekend: d.weekend, outside: !d.inMonth }"
+          :style="{ gridColumn: di + 1, gridRow: '1 / -1' }"
+        />
+        <!-- 날짜 숫자 -->
+        <div
+          v-for="(d, di) in wk.week"
+          :key="'n' + d.iso"
+          class="mg-dnum"
+          :class="{ today: d.isToday, outside: !d.inMonth }"
+          :style="{ gridColumn: di + 1, gridRow: 1 }"
+        >
+          <span class="mg-dn">{{ d.d }}</span>
+        </div>
+        <!-- 일정 막대 -->
+        <button
+          v-for="b in wk.items"
+          :key="b.ev.id"
+          type="button"
+          class="mg-bar"
+          :class="{ sel: b.ev.id === selId }"
+          :style="{
+            gridColumn: `${b.startIdx + 1} / span ${b.span}`,
+            gridRow: b.lane + 2,
+            '--c': colorOf(b.ev.categoryId),
+            '--w': weakOf(colorOf(b.ev.categoryId)),
+          }"
+          @click="emit('select', b.ev.id)"
+        >
+          <span class="mg-bt">{{ b.ev.title }}</span>
+        </button>
+        <!-- 초과(+N) -->
+        <template
+          v-for="(n, di) in wk.moreByDay"
+          :key="'m' + di"
+        >
+          <div
+            v-if="n > 0"
+            class="mg-more"
+            :style="{ gridColumn: di + 1, gridRow: VISIBLE_LANES + 2 }"
+          >
+            +{{ n }}
+          </div>
+        </template>
+      </div>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.mg {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+  border: 1px solid var(--border);
+  border-radius: 0.75rem;
+  background: var(--panel);
+  box-shadow: var(--shadow-sm);
+}
+.mg-head {
+  display: grid;
+  grid-template-columns: repeat(7, 1fr);
+  border-bottom: 1px solid var(--border-strong);
+  flex-shrink: 0;
+}
+.mg-hd {
+  padding: 0.5rem 0;
+  text-align: center;
+  font-size: 0.75rem;
+  font-weight: 600;
+  color: var(--text-3);
+  border-left: 1px solid var(--border);
+}
+.mg-hd:first-child {
+  border-left: none;
+}
+.mg-hd.weekend {
+  color: var(--text-3);
+  background: #fafbfc;
+}
+.mg-body {
+  flex: 1;
+  min-height: 0;
+  display: flex;
+  flex-direction: column;
+  overflow-y: auto;
+}
+.mg-week {
+  flex: 1;
+  min-height: 6rem;
+  display: grid;
+  grid-template-columns: repeat(7, 1fr);
+  grid-template-rows: 1.625rem repeat(3, 1.375rem) 1fr;
+  row-gap: 0.125rem;
+  border-top: 1px solid var(--border);
+}
+.mg-week:first-child {
+  border-top: none;
+}
+.mg-bg {
+  border-left: 1px solid var(--border);
+  min-width: 0;
+}
+.mg-bg:nth-child(7n + 1) {
+  border-left: none;
+}
+.mg-bg.weekend {
+  background: #fafbfc;
+}
+.mg-bg.outside {
+  background: #f7f8fa;
+}
+.mg-bg.today {
+  background: color-mix(in srgb, var(--accent) 6%, #fff);
+}
+.mg-dnum {
+  z-index: 1;
+  display: flex;
+  justify-content: flex-end;
+  padding: 0.25rem 0.4375rem 0;
+}
+.mg-dn {
+  display: inline-grid;
+  place-items: center;
+  min-width: 1.25rem;
+  height: 1.25rem;
+  padding: 0 0.25rem;
+  font-size: 0.75rem;
+  font-weight: 600;
+  color: var(--text-2);
+  border-radius: 0.625rem;
+}
+.mg-dnum.outside .mg-dn {
+  color: var(--text-3);
+}
+.mg-dnum.today .mg-dn {
+  background: var(--accent);
+  color: #fff;
+}
+.mg-bar {
+  z-index: 1;
+  margin: 0 0.25rem;
+  padding: 0 0.4375rem;
+  height: 1.25rem;
+  display: flex;
+  align-items: center;
+  border: none;
+  border-left: 3px solid var(--c);
+  border-radius: 0.3125rem;
+  background: var(--w);
+  cursor: pointer;
+  overflow: hidden;
+  font-family: inherit;
+}
+.mg-bar:hover {
+  filter: brightness(0.97);
+}
+.mg-bar.sel {
+  box-shadow: 0 0 0 2px var(--accent);
+}
+.mg-bt {
+  font-size: 0.719rem;
+  font-weight: 600;
+  color: var(--text);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.mg-more {
+  z-index: 1;
+  align-self: start;
+  margin: 0 0.4375rem;
+  font-size: 0.6875rem;
+  font-weight: 700;
+  color: var(--text-3);
+}
+</style>
diff --git a/frontend/src/pages/relay/SchedulePage.vue b/frontend/src/pages/relay/SchedulePage.vue
index f3497a1..9d5dc05 100644
--- a/frontend/src/pages/relay/SchedulePage.vue
+++ b/frontend/src/pages/relay/SchedulePage.vue
@@ -1,13 +1,15 @@
 <script setup lang="ts">
-// 일정 — 전사 공유 주간 타임라인(간트형) 캘린더
+// 일정 — 전사 공유 캘린더(주간 간트 / 월간 달력 그리드 전환)
 import { computed, onMounted, ref } from 'vue'
 import AppShell from '@/layouts/AppShell.vue'
 import ScheduleTimeline from '@/components/schedule/ScheduleTimeline.vue'
+import ScheduleMonthGrid from '@/components/schedule/ScheduleMonthGrid.vue'
 import ScheduleDetailPanel from '@/components/schedule/ScheduleDetailPanel.vue'
 import ScheduleEventModal from '@/components/schedule/ScheduleEventModal.vue'
 import ScheduleCategoryModal from '@/components/schedule/ScheduleCategoryModal.vue'
 import ScheduleTypeFilter from '@/components/schedule/ScheduleTypeFilter.vue'
-import { useScheduleStore } from '@/stores/schedule.store'
+import SegmentedTabs from '@/components/common/SegmentedTabs.vue'
+import { useScheduleStore, type ScheduleViewMode } from '@/stores/schedule.store'
 import { useDialogStore } from '@/stores/dialog.store'
 import type {
   ApiScheduleEvent,
@@ -18,6 +20,12 @@ import type {
 const store = useScheduleStore()
 const dialog = useDialogStore()
 
+// 보기 모드 토글 옵션
+const VIEW_OPTIONS: { value: ScheduleViewMode; label: string }[] = [
+  { value: 'week', label: '주간' },
+  { value: 'month', label: '월간' },
+]
+
 const selId = ref<string | null>(null)
 const eventModal = ref<{ init: ApiScheduleEvent | null } | null>(null)
 const catModal = ref<{ init: import('@/types/schedule').ApiScheduleCategory | null } | null>(null)
@@ -107,8 +115,8 @@ async function onDeleteCategory(id: string): Promise<void> {
           <div class="navgroup">
             <button
               class="navbtn"
-              title="이전 주"
-              @click="store.goPrevWeek()"
+              :title="store.viewMode === 'week' ? '이전 주' : '이전 달'"
+              @click="store.goPrev()"
             >
               <svg
                 viewBox="0 0 24 24"
@@ -121,8 +129,8 @@ async function onDeleteCategory(id: string): Promise<void> {
             </button>
             <button
               class="navbtn"
-              title="다음 주"
-              @click="store.goNextWeek()"
+              :title="store.viewMode === 'week' ? '다음 주' : '다음 달'"
+              @click="store.goNext()"
             >
               <svg
                 viewBox="0 0 24 24"
@@ -136,6 +144,11 @@ async function onDeleteCategory(id: string): Promise<void> {
           </div>
           <span class="range">{{ store.rangeLabel }}</span>
         </div>
+        <SegmentedTabs
+          :model-value="store.viewMode"
+          :options="VIEW_OPTIONS"
+          @update:model-value="store.setViewMode"
+        />
         <div class="spacer" />
         <ScheduleTypeFilter
           :categories="store.categories"
@@ -166,6 +179,7 @@ async function onDeleteCategory(id: string): Promise<void> {
       <div class="content-row">
         <div class="viewport">
           <ScheduleTimeline
+            v-if="store.viewMode === 'week'"
             :categories="store.categories"
             :events="store.events"
             :days="store.days"
@@ -174,6 +188,15 @@ async function onDeleteCategory(id: string): Promise<void> {
             @select="selId = $event"
             @add-category="openNewCategory"
           />
+          <ScheduleMonthGrid
+            v-else
+            :weeks="store.monthWeeks"
+            :events="store.events"
+            :categories="store.categories"
+            :active-type-ids="store.activeTypeIds"
+            :sel-id="selId"
+            @select="selId = $event"
+          />
         </div>
         <div
           v-if="selEvent"
diff --git a/frontend/src/shared/utils/scheduleDate.ts b/frontend/src/shared/utils/scheduleDate.ts
index 8851e3d..7d9bd5c 100644
--- a/frontend/src/shared/utils/scheduleDate.ts
+++ b/frontend/src/shared/utils/scheduleDate.ts
@@ -92,3 +92,63 @@ export function eventDateText(start: string, end: string): string {
 export function spanDays(start: string, end: string): number {
   return Math.round((dateOf(end).getTime() - dateOf(start).getTime()) / 86400000) + 1
 }
+
+// ===== 월간(달력 그리드) =====
+
+// 해당 월의 1일 ISO
+export function firstOfMonth(iso: string): string {
+  const d = dateOf(iso)
+  return isoOf(new Date(d.getFullYear(), d.getMonth(), 1))
+}
+
+// iso + n개월 (말일 넘침 보정)
+export function addMonths(iso: string, n: number): string {
+  const d = dateOf(iso)
+  const day = d.getDate()
+  const base = new Date(d.getFullYear(), d.getMonth() + n, 1)
+  const dim = new Date(base.getFullYear(), base.getMonth() + 1, 0).getDate()
+  base.setDate(Math.min(day, dim))
+  return isoOf(base)
+}
+
+// 월 라벨 — '2026년 6월'
+export function monthLabel(iso: string): string {
+  const d = dateOf(iso)
+  return `${d.getFullYear()}년 ${d.getMonth() + 1}월`
+}
+
+// 달력 그리드의 하루(요일 + 이번 달 여부)
+export interface MonthDay extends WeekDay {
+  inMonth: boolean
+}
+
+// 월 달력 그리드 — 1일이 속한 주의 월요일부터 말일이 속한 주의 일요일까지(4~6주)
+export function monthGridWeeks(iso: string): MonthDay[][] {
+  const monthIdx = dateOf(firstOfMonth(iso)).getMonth()
+  const gridStart = mondayOf(firstOfMonth(iso))
+  const first = dateOf(firstOfMonth(iso))
+  const lastDayIso = isoOf(new Date(first.getFullYear(), first.getMonth() + 1, 0))
+  const gridEnd = addDays(mondayOf(lastDayIso), 6)
+  const today = todayIso()
+
+  const weeks: MonthDay[][] = []
+  let cur = gridStart
+  while (cur <= gridEnd) {
+    const week: MonthDay[] = []
+    for (let i = 0; i < 7; i++) {
+      const dayIso = addDays(cur, i)
+      const dt = dateOf(dayIso)
+      week.push({
+        iso: dayIso,
+        dow: DOW_KO[i] ?? '',
+        d: dt.getDate(),
+        weekend: i >= 5,
+        isToday: dayIso === today,
+        inMonth: dt.getMonth() === monthIdx,
+      })
+    }
+    weeks.push(week)
+    cur = addDays(cur, 7)
+  }
+  return weeks
+}
diff --git a/frontend/src/stores/schedule.store.ts b/frontend/src/stores/schedule.store.ts
index 9f6721d..acad015 100644
--- a/frontend/src/stores/schedule.store.ts
+++ b/frontend/src/stores/schedule.store.ts
@@ -3,10 +3,15 @@ import { defineStore } from 'pinia'
 import { useSchedule } from '@/composables/useSchedule'
 import {
   addDays,
+  addMonths,
+  firstOfMonth,
   mondayOf,
+  monthGridWeeks,
+  monthLabel,
   todayIso,
   weekDays,
   weekRangeLabel,
+  type MonthDay,
   type WeekDay,
 } from '@/shared/utils/scheduleDate'
 import type {
@@ -17,7 +22,9 @@ import type {
   ScheduleEventPayload,
 } from '@/types/schedule'
 
-// 일정 스토어 — 카테고리/일정/참석자 + 주간 네비 상태 + CRUD
+export type ScheduleViewMode = 'week' | 'month'
+
+// 일정 스토어 — 카테고리/일정/참석자 + 주간/월간 네비 상태 + CRUD
 export const useScheduleStore = defineStore('schedule', () => {
   const api = useSchedule()
 
@@ -26,16 +33,38 @@ export const useScheduleStore = defineStore('schedule', () => {
   const people = ref<ApiSchedulePerson[]>([])
   // 활성(표시) 카테고리 id 집합 — 유형 필터
   const activeTypeIds = ref<Set<string>>(new Set())
-  // 주 시작(월요일) ISO
-  const weekStart = ref<string>(mondayOf(todayIso()))
+  // 보기 모드(주간/월간) + 기준 날짜(이 날짜가 속한 주/월을 표시)
+  const viewMode = ref<ScheduleViewMode>('week')
+  const anchor = ref<string>(todayIso())
   const loading = ref(false)
 
-  // 파생: 주간 7일
+  // --- 파생: 표시 단위 ---
+  // 주간: 월요일 시작 7일
+  const weekStart = computed(() => mondayOf(anchor.value))
   const days = computed<WeekDay[]>(() => weekDays(weekStart.value))
-  const rangeLabel = computed(() => weekRangeLabel(weekStart.value))
-  const weekEnd = computed(() => addDays(weekStart.value, 6))
+  // 월간: 달력 그리드(주 배열)
+  const monthWeeks = computed<MonthDay[][]>(() => monthGridWeeks(anchor.value))
 
-  // 카테고리별 현재 주 일정 수(필터 드롭다운 표기용)
+  // 조회 범위(현재 모드가 화면에 보여주는 전체 기간)
+  const rangeStart = computed(() => {
+    if (viewMode.value === 'week') return weekStart.value
+    const w = monthWeeks.value
+    return w[0]?.[0]?.iso ?? weekStart.value
+  })
+  const rangeEnd = computed(() => {
+    if (viewMode.value === 'week') return addDays(weekStart.value, 6)
+    const w = monthWeeks.value
+    return w[w.length - 1]?.[6]?.iso ?? addDays(weekStart.value, 6)
+  })
+
+  // 상단 범위 라벨 — 주간: '2026년 6월 23 – 29일' / 월간: '2026년 6월'
+  const rangeLabel = computed(() =>
+    viewMode.value === 'week'
+      ? weekRangeLabel(weekStart.value)
+      : monthLabel(anchor.value),
+  )
+
+  // 카테고리별 현재 범위 일정 수(필터 드롭다운 표기용)
   const counts = computed<Record<string, number>>(() => {
     const c: Record<string, number> = {}
     for (const e of events.value) c[e.categoryId] = (c[e.categoryId] || 0) + 1
@@ -44,14 +73,14 @@ export const useScheduleStore = defineStore('schedule', () => {
 
   // --- 로딩 ---
 
-  // 최초 진입 — 카테고리/참석자/주간 일정 동시 로드 + 필터 전체 활성화
+  // 최초 진입 — 카테고리/참석자/현재 범위 일정 동시 로드 + 필터 전체 활성화
   async function init(): Promise<void> {
     loading.value = true
     try {
       const [cats, ppl, evs] = await Promise.all([
         api.listCategories(),
         api.listPeople(),
-        api.listEvents(weekStart.value, weekEnd.value),
+        api.listEvents(rangeStart.value, rangeEnd.value),
       ])
       categories.value = cats
       people.value = ppl
@@ -62,22 +91,33 @@ export const useScheduleStore = defineStore('schedule', () => {
     }
   }
 
-  // 현재 주 일정만 재조회
+  // 현재 범위 일정만 재조회
   async function reloadEvents(): Promise<void> {
-    events.value = await api.listEvents(weekStart.value, weekEnd.value)
+    events.value = await api.listEvents(rangeStart.value, rangeEnd.value)
   }
 
-  // --- 주간 네비 ---
-  function goPrevWeek(): void {
-    weekStart.value = addDays(weekStart.value, -7)
+  // --- 네비(모드별) ---
+  function setViewMode(mode: ScheduleViewMode): void {
+    if (viewMode.value === mode) return
+    viewMode.value = mode
     void reloadEvents()
   }
-  function goNextWeek(): void {
-    weekStart.value = addDays(weekStart.value, 7)
+  function goPrev(): void {
+    anchor.value =
+      viewMode.value === 'week'
+        ? addDays(anchor.value, -7)
+        : addMonths(firstOfMonth(anchor.value), -1)
+    void reloadEvents()
+  }
+  function goNext(): void {
+    anchor.value =
+      viewMode.value === 'week'
+        ? addDays(anchor.value, 7)
+        : addMonths(firstOfMonth(anchor.value), 1)
     void reloadEvents()
   }
   function goToday(): void {
-    weekStart.value = mondayOf(todayIso())
+    anchor.value = todayIso()
     void reloadEvents()
   }
 
@@ -135,7 +175,7 @@ export const useScheduleStore = defineStore('schedule', () => {
     const n = new Set(activeTypeIds.value)
     n.delete(id)
     activeTypeIds.value = n
-    // 포함 일정이 cascade 삭제되었으므로 주간 일정 재조회
+    // 포함 일정이 cascade 삭제되었으므로 재조회
     await reloadEvents()
   }
 
@@ -150,15 +190,18 @@ export const useScheduleStore = defineStore('schedule', () => {
     events,
     people,
     activeTypeIds,
+    viewMode,
     weekStart,
     loading,
     days,
+    monthWeeks,
     rangeLabel,
     counts,
     init,
     reloadEvents,
-    goPrevWeek,
-    goNextWeek,
+    setViewMode,
+    goPrev,
+    goNext,
     goToday,
     toggleType,
     setAllTypes,