diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22b5506f28..9e42d0448e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,10 +9,12 @@
 
 ### Client
 - Enhance: l10nの更新
+- Enhance: アーカイブした個人宛のお知らせを表示・編集できるように
 - Fix: メールアドレス不要でCaptchaが有効な場合にアカウント登録完了後自動でのログインに失敗する問題を修正
 
 ### Server
 - Feat: モデレータ権限を持つユーザが全員7日間活動しなかった場合は自動的に招待制へと移行するように ( #13437 )
+- Enhance: 個人宛のお知らせは「わかった」を押すと自動的にアーカイブされるように
 - Fix: `admin/emoji/update`エンドポイントのidのみ指定した時不正なエラーが発生するバグを修正
 - Fix: RBT有効時、リノートのリアクションが反映されない問題を修正
 
diff --git a/packages/backend/src/core/AnnouncementService.ts b/packages/backend/src/core/AnnouncementService.ts
index 40a9db01c0..d4fcf19439 100644
--- a/packages/backend/src/core/AnnouncementService.ts
+++ b/packages/backend/src/core/AnnouncementService.ts
@@ -209,6 +209,13 @@ export class AnnouncementService {
 			return;
 		}
 
+		const announcement = await this.announcementsRepository.findOneBy({ id: announcementId });
+		if (announcement != null && announcement.userId === user.id) {
+			await this.announcementsRepository.update(announcementId, {
+				isActive: false,
+			});
+		}
+
 		if ((await this.getUnreadAnnouncements(user)).length === 0) {
 			this.globalEventService.publishMainStream(user.id, 'readAllAnnouncements');
 		}
diff --git a/packages/frontend/src/pages/admin-user.vue b/packages/frontend/src/pages/admin-user.vue
index d33b116059..948e7a3cce 100644
--- a/packages/frontend/src/pages/admin-user.vue
+++ b/packages/frontend/src/pages/admin-user.vue
@@ -153,6 +153,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<div v-else-if="tab === 'announcements'" class="_gaps">
 				<MkButton primary rounded @click="createAnnouncement"><i class="ti ti-plus"></i> {{ i18n.ts.new }}</MkButton>
 
+				<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>
+
 				<MkPagination :pagination="announcementsPagination">
 					<template #default="{ items }">
 						<div class="_gaps_s">
@@ -254,11 +260,15 @@ const filesPagination = {
 		userId: props.userId,
 	})),
 };
+
+const announcementsStatus = ref<'active' | 'archived'>('active');
+
 const announcementsPagination = {
 	endpoint: 'admin/announcements/list' as const,
 	limit: 10,
 	params: computed(() => ({
 		userId: props.userId,
+		status: announcementsStatus.value,
 	})),
 };
 const expandedRoles = ref([]);