diff --git a/CHANGELOG.md b/CHANGELOG.md
index 54c0554e8a..34a69f1d02 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@
 - 絵文字オートコンプリートの挙動を改修
 - localStorageのaccountsはindexedDBで保持するように
 - ActivityPub: ジョブキューの試行タイミングを調整 (#7635)
+- API: sw/unregisterを追加
 - 依存関係の更新
 
 ### Bugfixes
diff --git a/src/server/api/endpoints/sw/unregister.ts b/src/server/api/endpoints/sw/unregister.ts
new file mode 100644
index 0000000000..a206254950
--- /dev/null
+++ b/src/server/api/endpoints/sw/unregister.ts
@@ -0,0 +1,27 @@
+import $ from 'cafy';
+import define from '../../define';
+import { SwSubscriptions } from '../../../../models';
+
+export const meta = {
+	tags: ['account'],
+
+	requireCredential: true as const,
+
+	desc: {
+		'ja-JP': 'Push通知の登録を削除します。',
+		'en-US': 'Remove push noticfication registration'
+	},
+
+	params: {
+		endpoint: {
+			validator: $.str
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	await SwSubscriptions.delete({
+		userId: user.id,
+		endpoint: ps.endpoint,
+	});
+});