diff --git a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
index 6573e9454a..58bbf223a1 100644
--- a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
@@ -81,6 +81,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 			const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'),
 				ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+				.andWhere('note.createdAt > :minDate', { minDate: new Date(Date.now() - (1000 * 60 * 60 * 24 * 30)) }) // 30日前まで
 				.andWhere(new Brackets(qb => {
 					qb.where(`((note.userId IN (${ followingQuery.getQuery() })) OR (note.userId = :meId))`, { meId: me.id })
 						.orWhere('(note.visibility = \'public\') AND (note.userHost IS NULL)');
diff --git a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
index fac14fa225..d3594814b0 100644
--- a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
@@ -1,7 +1,6 @@
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import type { NotesRepository } from '@/models/index.js';
-import type { UsersRepository } from '@/models/index.js';
+import type { NotesRepository, UsersRepository } from '@/models/index.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { QueryService } from '@/core/QueryService.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
@@ -76,6 +75,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			//#region Construct query
 			const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'),
 				ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+				.andWhere('note.createdAt > :minDate', { minDate: new Date(Date.now() - (1000 * 60 * 60 * 24 * 30)) }) // 30日前まで
 				.andWhere('(note.visibility = \'public\') AND (note.userHost IS NULL)')
 				.innerJoinAndSelect('note.user', 'user')
 				.leftJoinAndSelect('user.avatar', 'avatar')
diff --git a/packages/backend/src/server/api/endpoints/notes/timeline.ts b/packages/backend/src/server/api/endpoints/notes/timeline.ts
index 8542af17db..145d3f5c83 100644
--- a/packages/backend/src/server/api/endpoints/notes/timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/timeline.ts
@@ -73,6 +73,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 			const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'),
 				ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+				.andWhere('note.createdAt > :minDate', { minDate: new Date(Date.now() - (1000 * 60 * 60 * 24 * 30)) }) // 30日前まで
 				.andWhere(new Brackets(qb => { qb
 					.where('note.userId = :meId', { meId: me.id });
 				if (hasFollowing) qb.orWhere(`note.userId IN (${ followingQuery.getQuery() })`);