diff --git a/packages/backend/src/server/api/endpoints/notes/renotes.ts b/packages/backend/src/server/api/endpoints/notes/renotes.ts
index 9f16181a3..2099701ab 100644
--- a/packages/backend/src/server/api/endpoints/notes/renotes.ts
+++ b/packages/backend/src/server/api/endpoints/notes/renotes.ts
@@ -40,6 +40,7 @@ export const paramDef = {
 	type: 'object',
 	properties: {
 		noteId: { type: 'string', format: 'misskey:id' },
+		userId: { type: "string", format: "misskey:id" },
 		limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
 		sinceId: { type: 'string', format: 'misskey:id' },
 		untilId: { type: 'string', format: 'misskey:id' },
@@ -70,6 +71,10 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				.leftJoinAndSelect('note.renote', 'renote')
 				.leftJoinAndSelect('reply.user', 'replyUser')
 				.leftJoinAndSelect('renote.user', 'renoteUser');
+			
+			if (ps.userId) {
+				query.andWhere("user.id = :userId", { userId: ps.userId });
+			}			
 
 			this.queryService.generateVisibilityQuery(query, me);
 			if (me) this.queryService.generateMutedUserQuery(query, me);