diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ce0cc6b3..8b5579db4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@
 - Fix: pgroongaでの検索時にはじめのキーワードのみが検索に使用される問題を修正  
   (Cherry-picked from https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/886)
 - Fix: メールアドレスの形式が正しくなければ以降の処理を行わないように
+- Fix: クリップの説明欄を更新する際に空にできない問題を修正
 - Fix: フォロワーではないユーザーにリノートもしくは返信された場合にノートのDeleteアクティビティが送られていない問題を修正
 
 ## 2025.2.0
diff --git a/packages/backend/src/server/api/endpoints/clips/create.ts b/packages/backend/src/server/api/endpoints/clips/create.ts
index ceebc8ba5..b40706297 100644
--- a/packages/backend/src/server/api/endpoints/clips/create.ts
+++ b/packages/backend/src/server/api/endpoints/clips/create.ts
@@ -39,7 +39,7 @@ export const paramDef = {
 	properties: {
 		name: { type: 'string', minLength: 1, maxLength: 100 },
 		isPublic: { type: 'boolean', default: false },
-		description: { type: 'string', nullable: true, minLength: 1, maxLength: 2048 },
+		description: { type: 'string', nullable: true, maxLength: 2048 },
 	},
 	required: ['name'],
 } as const;
@@ -53,7 +53,9 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		super(meta, paramDef, async (ps, me) => {
 			let clip: MiClip;
 			try {
-				clip = await this.clipService.create(me, ps.name, ps.isPublic, ps.description ?? null);
+				// 空文字列をnullにしたいので??は使わない
+				// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+				clip = await this.clipService.create(me, ps.name, ps.isPublic, ps.description || null);
 			} catch (e) {
 				if (e instanceof ClipService.TooManyClipsError) {
 					throw new ApiError(meta.errors.tooManyClips);
diff --git a/packages/backend/src/server/api/endpoints/clips/update.ts b/packages/backend/src/server/api/endpoints/clips/update.ts
index 603a3ccf3..6ff3f9aad 100644
--- a/packages/backend/src/server/api/endpoints/clips/update.ts
+++ b/packages/backend/src/server/api/endpoints/clips/update.ts
@@ -39,7 +39,7 @@ export const paramDef = {
 		clipId: { type: 'string', format: 'misskey:id' },
 		name: { type: 'string', minLength: 1, maxLength: 100 },
 		isPublic: { type: 'boolean' },
-		description: { type: 'string', nullable: true, minLength: 1, maxLength: 2048 },
+		description: { type: 'string', nullable: true, maxLength: 2048 },
 	},
 	required: ['clipId'],
 } as const;
@@ -53,7 +53,9 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			try {
-				await this.clipService.update(me, ps.clipId, ps.name, ps.isPublic, ps.description);
+				// 空文字列をnullにしたいので??は使わない
+				// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+				await this.clipService.update(me, ps.clipId, ps.name, ps.isPublic, ps.description || null);
 			} catch (e) {
 				if (e instanceof ClipService.NoSuchClipError) {
 					throw new ApiError(meta.errors.noSuchClip);
diff --git a/packages/backend/test/e2e/clips.ts b/packages/backend/test/e2e/clips.ts
index a130c3698..7ae1ee452 100644
--- a/packages/backend/test/e2e/clips.ts
+++ b/packages/backend/test/e2e/clips.ts
@@ -182,7 +182,6 @@ describe('クリップ', () => {
 		{ label: 'nameがnull', parameters: { name: null } },
 		{ label: 'nameが最大長+1', parameters: { name: 'x'.repeat(101) } },
 		{ label: 'isPublicがboolじゃない', parameters: { isPublic: 'true' } },
-		{ label: 'descriptionがゼロ長', parameters: { description: '' } },
 		{ label: 'descriptionが最大長+1', parameters: { description: 'a'.repeat(2049) } },
 	];
 	test.each(createClipDenyPattern)('の作成は$labelならできない', async ({ parameters }) => failedApiCall({
@@ -199,6 +198,23 @@ describe('クリップ', () => {
 		id: '3d81ceae-475f-4600-b2a8-2bc116157532',
 	}));
 
+	test('の作成はdescriptionが空文字ならnullになる', async () => {
+		const clip = await successfulApiCall({
+			endpoint: 'clips/create',
+			parameters: {
+				...defaultCreate(),
+				description: '',
+			},
+			user: alice,
+		});
+
+		assert.deepStrictEqual(clip, {
+			...clip,
+			...defaultCreate(),
+			description: null,
+		});
+	});
+
 	test('の更新ができる', async () => {
 		const res = await update({
 			clipId: (await create()).id,
@@ -249,6 +265,24 @@ describe('クリップ', () => {
 		...assertion,
 	}));
 
+	test('の更新はdescriptionが空文字ならnullになる', async () => {
+		const clip = await successfulApiCall({
+			endpoint: 'clips/update',
+			parameters: {
+				clipId: (await create()).id,
+				name: 'updated',
+				description: '',
+			},
+			user: alice,
+		});
+
+		assert.deepStrictEqual(clip, {
+			...clip,
+			name: 'updated',
+			description: null,
+		});
+	});
+
 	test('の削除ができる', async () => {
 		await deleteClip({
 			clipId: (await create()).id,