diff --git a/CHANGELOG.md b/CHANGELOG.md
index 17c233e358..8da94f3749 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
 - Feat: ユーザーのアイコン/バナーの変更可否をロールで設定可能に
   - 変更不可となっていても、設定済みのものを解除してデフォルト画像に戻すことは出来ます
 - Feat: ユーザ作成時にSystemWebhookを送信可能に #14281
+- Enhance: 管理画面でアーカイブにしたお知らせを表示・編集できるように
 - Fix: 配信停止したインスタンス一覧が見れなくなる問題を修正
 - Fix: Dockerコンテナの立ち上げ時に`pnpm`のインストールで固まることがある問題
 - Fix: デフォルトテーマに無効なテーマコードを入力するとUIが使用できなくなる問題を修正
diff --git a/locales/index.d.ts b/locales/index.d.ts
index 2b340ecbb5..d54b752312 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -4440,6 +4440,14 @@ export interface Locale extends ILocale {
      * アーカイブ
      */
     "archive": string;
+    /**
+     * アーカイブ済み
+     */
+    "archived": string;
+    /**
+     * アーカイブ解除
+     */
+    "unarchive": string;
     /**
      * {name}をアーカイブしますか？
      */
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index f0f849fb38..d8531070fe 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1106,6 +1106,8 @@ preservedUsernames: "予約ユーザー名"
 preservedUsernamesDescription: "予約するユーザー名を改行で列挙します。ここで指定されたユーザー名はアカウント作成時に使えなくなりますが、管理者によるアカウント作成時はこの制限を受けません。また、既に存在するアカウントも影響を受けません。"
 createNoteFromTheFile: "このファイルからノートを作成"
 archive: "アーカイブ"
+archived: "アーカイブ済み"
+unarchive: "アーカイブ解除"
 channelArchiveConfirmTitle: "{name}をアーカイブしますか？"
 channelArchiveConfirmDescription: "アーカイブすると、チャンネル一覧や検索結果に表示されなくなり、新たな書き込みもできなくなります。"
 thisChannelArchived: "このチャンネルはアーカイブされています。"
diff --git a/packages/backend/src/server/api/endpoints/admin/announcements/list.ts b/packages/backend/src/server/api/endpoints/admin/announcements/list.ts
index 87eaad31a3..7596bf44e3 100644
--- a/packages/backend/src/server/api/endpoints/admin/announcements/list.ts
+++ b/packages/backend/src/server/api/endpoints/admin/announcements/list.ts
@@ -69,6 +69,7 @@ export const paramDef = {
 		sinceId: { type: 'string', format: 'misskey:id' },
 		untilId: { type: 'string', format: 'misskey:id' },
 		userId: { type: 'string', format: 'misskey:id', nullable: true },
+		status: { type: 'string', enum: ['all', 'active', 'archived'], default: 'active' },
 	},
 	required: [],
 } as const;
@@ -87,7 +88,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const query = this.queryService.makePaginationQuery(this.announcementsRepository.createQueryBuilder('announcement'), ps.sinceId, ps.untilId);
-			query.andWhere('announcement.isActive = true');
+
+			if (ps.status === 'archived') {
+				query.andWhere('announcement.isActive = false');
+			} else if (ps.status === 'active') {
+				query.andWhere('announcement.isActive = true');
+			}
+
 			if (ps.userId) {
 				query.andWhere('announcement.userId = :userId', { userId: ps.userId });
 			} else {
diff --git a/packages/frontend/src/pages/admin/_header_.vue b/packages/frontend/src/pages/admin/_header_.vue
index c5a9609e6e..b88f078598 100644
--- a/packages/frontend/src/pages/admin/_header_.vue
+++ b/packages/frontend/src/pages/admin/_header_.vue
@@ -24,8 +24,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<div class="buttons right">
 		<template v-if="actions">
 			<template v-for="action in actions">
-				<MkButton v-if="action.asFullButton" class="fullButton" primary @click.stop="action.handler"><i :class="action.icon" style="margin-right: 6px;"></i>{{ action.text }}</MkButton>
-				<button v-else v-tooltip.noDelay="action.text" class="_button button" :class="{ highlighted: action.highlighted }" @click.stop="action.handler" @touchstart="preventDrag"><i :class="action.icon"></i></button>
+				<MkButton v-if="action.asFullButton" class="fullButton" primary :disabled="action.disabled" @click.stop="action.handler"><i :class="action.icon" style="margin-right: 6px;"></i>{{ action.text }}</MkButton>
+				<button v-else v-tooltip.noDelay="action.text" class="_button button" :class="{ highlighted: action.highlighted }" :disabled="action.disabled" @click.stop="action.handler" @touchstart="preventDrag"><i :class="action.icon"></i></button>
 			</template>
 		</template>
 	</div>
@@ -56,6 +56,7 @@ const props = defineProps<{
 		text: string;
 		icon: string;
 		asFullButton?: boolean;
+		disabled?: boolean;
 		handler: (ev: MouseEvent) => void;
 	}[];
 	thin?: boolean;
diff --git a/packages/frontend/src/pages/admin/announcements.vue b/packages/frontend/src/pages/admin/announcements.vue
index e7fb62ec1d..b9e09c8d03 100644
--- a/packages/frontend/src/pages/admin/announcements.vue
+++ b/packages/frontend/src/pages/admin/announcements.vue
@@ -11,70 +11,83 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<MkInfo>{{ i18n.ts._announcement.shouldNotBeUsedToPresentPermanentInfo }}</MkInfo>
 			<MkInfo v-if="announcements.length > 5" warn>{{ i18n.ts._announcement.tooManyActiveAnnouncementDescription }}</MkInfo>
 
-			<MkFolder v-for="announcement in announcements" :key="announcement.id ?? announcement._id" :defaultOpen="announcement.id == null">
-				<template #label>{{ announcement.title }}</template>
-				<template #icon>
-					<i v-if="announcement.icon === 'info'" class="ti ti-info-circle"></i>
-					<i v-else-if="announcement.icon === 'warning'" class="ti ti-alert-triangle" style="color: var(--warn);"></i>
-					<i v-else-if="announcement.icon === 'error'" class="ti ti-circle-x" style="color: var(--error);"></i>
-					<i v-else-if="announcement.icon === 'success'" class="ti ti-check" style="color: var(--success);"></i>
-				</template>
-				<template #caption>{{ announcement.text }}</template>
+			<MkSelect v-model="announcementsStatus">
+				<template #label>{{ i18n.ts.filter }}</template>
+				<option value="active">{{ i18n.ts.active }}</option>
+				<option value="archived">{{ i18n.ts.archived }}</option>
+			</MkSelect>
 
-				<div class="_gaps_m">
-					<MkInput v-model="announcement.title">
-						<template #label>{{ i18n.ts.title }}</template>
-					</MkInput>
-					<MkTextarea v-model="announcement.text" mfmAutocomplete :mfmPreview="true">
-						<template #label>{{ i18n.ts.text }}</template>
-					</MkTextarea>
-					<MkInput v-model="announcement.imageUrl" type="url">
-						<template #label>{{ i18n.ts.imageUrl }}</template>
-					</MkInput>
-					<MkRadios v-model="announcement.icon">
-						<template #label>{{ i18n.ts.icon }}</template>
-						<option value="info"><i class="ti ti-info-circle"></i></option>
-						<option value="warning"><i class="ti ti-alert-triangle" style="color: var(--warn);"></i></option>
-						<option value="error"><i class="ti ti-circle-x" style="color: var(--error);"></i></option>
-						<option value="success"><i class="ti ti-check" style="color: var(--success);"></i></option>
-					</MkRadios>
-					<MkRadios v-model="announcement.display">
-						<template #label>{{ i18n.ts.display }}</template>
-						<option value="normal">{{ i18n.ts.normal }}</option>
-						<option value="banner">{{ i18n.ts.banner }}</option>
-						<option value="dialog">{{ i18n.ts.dialog }}</option>
-					</MkRadios>
-					<MkInfo v-if="announcement.display === 'dialog'" warn>{{ i18n.ts._announcement.dialogAnnouncementUxWarn }}</MkInfo>
-					<MkSwitch v-model="announcement.forExistingUsers" :helpText="i18n.ts._announcement.forExistingUsersDescription">
-						{{ i18n.ts._announcement.forExistingUsers }}
-					</MkSwitch>
-					<MkSwitch v-model="announcement.silence" :helpText="i18n.ts._announcement.silenceDescription">
-						{{ i18n.ts._announcement.silence }}
-					</MkSwitch>
-					<MkSwitch v-model="announcement.needConfirmationToRead" :helpText="i18n.ts._announcement.needConfirmationToReadDescription">
-						{{ i18n.ts._announcement.needConfirmationToRead }}
-					</MkSwitch>
-					<p v-if="announcement.reads">{{ i18n.tsx.nUsersRead({ n: announcement.reads }) }}</p>
-					<div class="buttons _buttons">
-						<MkButton class="button" inline primary @click="save(announcement)"><i class="ti ti-device-floppy"></i> {{ i18n.ts.save }}</MkButton>
-						<MkButton v-if="announcement.id != null" class="button" inline @click="archive(announcement)"><i class="ti ti-check"></i> {{ i18n.ts._announcement.end }} ({{ i18n.ts.archive }})</MkButton>
-						<MkButton v-if="announcement.id != null" class="button" inline danger @click="del(announcement)"><i class="ti ti-trash"></i> {{ i18n.ts.delete }}</MkButton>
+			<MkLoading v-if="loading"/>
+
+			<template v-else>
+				<MkFolder v-for="announcement in announcements" :key="announcement.id ?? announcement._id" :defaultOpen="announcement.id == null">
+					<template #label>{{ announcement.title }}</template>
+					<template #icon>
+						<i v-if="announcement.icon === 'info'" class="ti ti-info-circle"></i>
+						<i v-else-if="announcement.icon === 'warning'" class="ti ti-alert-triangle" style="color: var(--warn);"></i>
+						<i v-else-if="announcement.icon === 'error'" class="ti ti-circle-x" style="color: var(--error);"></i>
+						<i v-else-if="announcement.icon === 'success'" class="ti ti-check" style="color: var(--success);"></i>
+					</template>
+					<template #caption>{{ announcement.text }}</template>
+
+					<div class="_gaps_m">
+						<MkInput v-model="announcement.title">
+							<template #label>{{ i18n.ts.title }}</template>
+						</MkInput>
+						<MkTextarea v-model="announcement.text" mfmAutocomplete :mfmPreview="true">
+							<template #label>{{ i18n.ts.text }}</template>
+						</MkTextarea>
+						<MkInput v-model="announcement.imageUrl" type="url">
+							<template #label>{{ i18n.ts.imageUrl }}</template>
+						</MkInput>
+						<MkRadios v-model="announcement.icon">
+							<template #label>{{ i18n.ts.icon }}</template>
+							<option value="info"><i class="ti ti-info-circle"></i></option>
+							<option value="warning"><i class="ti ti-alert-triangle" style="color: var(--warn);"></i></option>
+							<option value="error"><i class="ti ti-circle-x" style="color: var(--error);"></i></option>
+							<option value="success"><i class="ti ti-check" style="color: var(--success);"></i></option>
+						</MkRadios>
+						<MkRadios v-model="announcement.display">
+							<template #label>{{ i18n.ts.display }}</template>
+							<option value="normal">{{ i18n.ts.normal }}</option>
+							<option value="banner">{{ i18n.ts.banner }}</option>
+							<option value="dialog">{{ i18n.ts.dialog }}</option>
+						</MkRadios>
+						<MkInfo v-if="announcement.display === 'dialog'" warn>{{ i18n.ts._announcement.dialogAnnouncementUxWarn }}</MkInfo>
+						<MkSwitch v-model="announcement.forExistingUsers" :helpText="i18n.ts._announcement.forExistingUsersDescription">
+							{{ i18n.ts._announcement.forExistingUsers }}
+						</MkSwitch>
+						<MkSwitch v-model="announcement.silence" :helpText="i18n.ts._announcement.silenceDescription">
+							{{ i18n.ts._announcement.silence }}
+						</MkSwitch>
+						<MkSwitch v-model="announcement.needConfirmationToRead" :helpText="i18n.ts._announcement.needConfirmationToReadDescription">
+							{{ i18n.ts._announcement.needConfirmationToRead }}
+						</MkSwitch>
+						<p v-if="announcement.reads">{{ i18n.tsx.nUsersRead({ n: announcement.reads }) }}</p>
+						<div class="buttons _buttons">
+							<MkButton class="button" inline primary @click="save(announcement)"><i class="ti ti-device-floppy"></i> {{ i18n.ts.save }}</MkButton>
+							<MkButton v-if="announcement.id != null && announcement.isActive" class="button" inline @click="archive(announcement)"><i class="ti ti-check"></i> {{ i18n.ts._announcement.end }} ({{ i18n.ts.archive }})</MkButton>
+							<MkButton v-if="announcement.id != null && !announcement.isActive" class="button" inline @click="unarchive(announcement)"><i class="ti ti-restore"></i> {{ i18n.ts.unarchive }}</MkButton>
+							<MkButton v-if="announcement.id != null" class="button" inline danger @click="del(announcement)"><i class="ti ti-trash"></i> {{ i18n.ts.delete }}</MkButton>
+						</div>
 					</div>
-				</div>
-			</MkFolder>
-			<MkButton class="button" @click="more()">
-				<i class="ti ti-reload"></i>{{ i18n.ts.more }}
-			</MkButton>
+				</MkFolder>
+				<MkLoading v-if="loadingMore"/>
+				<MkButton class="button" @click="more()">
+					<i class="ti ti-reload"></i>{{ i18n.ts.more }}
+				</MkButton>
+			</template>
 		</div>
 	</MkSpacer>
 </MkStickyContainer>
 </template>
 
 <script lang="ts" setup>
-import { ref, computed } from 'vue';
+import { ref, computed, watch } from 'vue';
 import XHeader from './_header_.vue';
 import MkButton from '@/components/MkButton.vue';
 import MkInput from '@/components/MkInput.vue';
+import MkSelect from '@/components/MkSelect.vue';
 import MkSwitch from '@/components/MkSwitch.vue';
 import MkRadios from '@/components/MkRadios.vue';
 import MkInfo from '@/components/MkInfo.vue';
@@ -85,11 +98,22 @@ import { definePageMetadata } from '@/scripts/page-metadata.js';
 import MkFolder from '@/components/MkFolder.vue';
 import MkTextarea from '@/components/MkTextarea.vue';
 
+const announcementsStatus = ref<'active' | 'archived'>('active');
+
+const loading = ref(true);
+const loadingMore = ref(false);
+
 const announcements = ref<any[]>([]);
 
-misskeyApi('admin/announcements/list').then(announcementResponse => {
-	announcements.value = announcementResponse;
-});
+watch(announcementsStatus, (to) => {
+	loading.value = true;
+	misskeyApi('admin/announcements/list', {
+		status: to,
+	}).then(announcementResponse => {
+		announcements.value = announcementResponse;
+		loading.value = false;
+	});
+}, { immediate: true });
 
 function add() {
 	announcements.value.unshift({
@@ -125,6 +149,14 @@ async function archive(announcement) {
 	refresh();
 }
 
+async function unarchive(announcement) {
+	await os.apiWithDialog('admin/announcements/update', {
+		...announcement,
+		isActive: true,
+	});
+	refresh();
+}
+
 async function save(announcement) {
 	if (announcement.id == null) {
 		await os.apiWithDialog('admin/announcements/create', announcement);
@@ -135,24 +167,32 @@ async function save(announcement) {
 }
 
 function more() {
-	misskeyApi('admin/announcements/list', { untilId: announcements.value.reduce((acc, announcement) => announcement.id != null ? announcement : acc).id }).then(announcementResponse => {
+	loadingMore.value = true;
+	misskeyApi('admin/announcements/list', {
+		status: announcementsStatus.value,
+		untilId: announcements.value.reduce((acc, announcement) => announcement.id != null ? announcement : acc).id
+	}).then(announcementResponse => {
 		announcements.value = announcements.value.concat(announcementResponse);
+		loadingMore.value = false;
 	});
 }
 
 function refresh() {
-	misskeyApi('admin/announcements/list').then(announcementResponse => {
+	loading.value = true;
+	misskeyApi('admin/announcements/list', {
+		status: announcementsStatus.value,
+	}).then(announcementResponse => {
 		announcements.value = announcementResponse;
+		loading.value = false;
 	});
 }
 
-refresh();
-
 const headerActions = computed(() => [{
 	asFullButton: true,
 	icon: 'ti ti-plus',
 	text: i18n.ts.add,
 	handler: add,
+	disabled: announcementsStatus.value === 'archived',
 }]);
 
 const headerTabs = computed(() => []);
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 52a571b694..4cfe92147a 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -6091,6 +6091,11 @@ export type operations = {
           untilId?: string;
           /** Format: misskey:id */
           userId?: string | null;
+          /**
+           * @default active
+           * @enum {string}
+           */
+          status?: 'all' | 'active' | 'archived';
         };
       };
     };