diff --git a/.config/cypress-devcontainer.yml b/.config/cypress-devcontainer.yml
index 8b11c8413c..294ff66ca2 100644
--- a/.config/cypress-devcontainer.yml
+++ b/.config/cypress-devcontainer.yml
@@ -218,6 +218,3 @@ proxyBypassHosts:
 allowedPrivateNetworks: [
   '127.0.0.1/32'
 ]
-
-# Upload or download file size limits (bytes)
-#maxFileSize: 262144000
diff --git a/.config/docker_example.yml b/.config/docker_example.yml
index dc354324dc..b4f3697d45 100644
--- a/.config/docker_example.yml
+++ b/.config/docker_example.yml
@@ -234,9 +234,6 @@ proxyBypassHosts:
 #  '127.0.0.1/32'
 #]
 
-# Upload or download file size limits (bytes)
-#maxFileSize: 262144000
-
 # Log settings
 # logging:
 #   sql:
diff --git a/.config/example.yml b/.config/example.yml
index c127eaae22..bb34379c53 100644
--- a/.config/example.yml
+++ b/.config/example.yml
@@ -332,9 +332,6 @@ proxyBypassHosts:
 #  '127.0.0.1/32'
 #]
 
-# Upload or download file size limits (bytes)
-#maxFileSize: 262144000
-
 # PID File of master process
 #pidFile: /tmp/misskey.pid
 
diff --git a/.devcontainer/devcontainer.yml b/.devcontainer/devcontainer.yml
index fb0d25c214..f52e7a5098 100644
--- a/.devcontainer/devcontainer.yml
+++ b/.devcontainer/devcontainer.yml
@@ -205,6 +205,3 @@ proxyBypassHosts:
 allowedPrivateNetworks: [
   '127.0.0.1/32'
 ]
-
-# Upload or download file size limits (bytes)
-#maxFileSize: 262144000
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a72ed9bdb..ef86ca5f19 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@
   - proxyRemoteFiles
   - disallowExternalApRedirect
     - 許可しないかどうかではなく、許可するかどうかの設定(allowExternalApRedirect)になりました
+- 設定ファイルの maxFileSize が削除されました
+  - リクエストの最大ペイロードサイズは、nginxやCDNなどのMisskeyの前段で制限をするか、ロール設定で制限してください。
 
 ### General
 - Feat: 非ログインでサーバーを閲覧された際に、サーバー内のコンテンツを非公開にすることができるようになりました
diff --git a/chart/files/default.yml b/chart/files/default.yml
index 8fa0b39eff..1867974225 100644
--- a/chart/files/default.yml
+++ b/chart/files/default.yml
@@ -224,6 +224,3 @@ id: "aidx"
 #allowedPrivateNetworks: [
 #  '127.0.0.1/32'
 #]
-
-# Upload or download file size limits (bytes)
-#maxFileSize: 262144000
diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index 9031096745..fd82a26907 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -80,8 +80,6 @@ type Source = {
 
 	allowedPrivateNetworks?: string[];
 
-	maxFileSize?: number;
-
 	clusterLimit?: number;
 
 	id: string;
@@ -152,7 +150,6 @@ export type Config = {
 	proxySmtp: string | undefined;
 	proxyBypassHosts: string[] | undefined;
 	allowedPrivateNetworks: string[] | undefined;
-	maxFileSize: number;
 	clusterLimit: number | undefined;
 	id: string;
 	outgoingAddress: string | undefined;
@@ -293,7 +290,6 @@ export function loadConfig(): Config {
 		proxySmtp: config.proxySmtp,
 		proxyBypassHosts: config.proxyBypassHosts,
 		allowedPrivateNetworks: config.allowedPrivateNetworks,
-		maxFileSize: config.maxFileSize ?? 262144000,
 		clusterLimit: config.clusterLimit,
 		outgoingAddress: config.outgoingAddress,
 		outgoingAddressFamily: config.outgoingAddressFamily,
diff --git a/packages/backend/src/core/DownloadService.ts b/packages/backend/src/core/DownloadService.ts
index a2b74d1ab2..324ed6855f 100644
--- a/packages/backend/src/core/DownloadService.ts
+++ b/packages/backend/src/core/DownloadService.ts
@@ -41,7 +41,7 @@ export class DownloadService {
 
 		const timeout = 30 * 1000;
 		const operationTimeout = 60 * 1000;
-		const maxSize = this.config.maxFileSize;
+		const maxSize = 1024 * 1024 * 1024; // 1GB
 
 		const urlObj = new URL(url);
 		let filename = urlObj.pathname.split('/').pop() ?? 'untitled';
diff --git a/packages/backend/src/core/entities/MetaEntityService.ts b/packages/backend/src/core/entities/MetaEntityService.ts
index 02783dc450..8fd2874492 100644
--- a/packages/backend/src/core/entities/MetaEntityService.ts
+++ b/packages/backend/src/core/entities/MetaEntityService.ts
@@ -131,7 +131,6 @@ export class MetaEntityService {
 			mediaProxy: this.config.mediaProxy,
 			enableUrlPreview: instance.urlPreviewEnabled,
 			noteSearchableScope: (this.config.meilisearch == null || this.config.meilisearch.scope !== 'local') ? 'global' : 'local',
-			maxFileSize: this.config.maxFileSize,
 			federation: this.meta.federation,
 		};
 
diff --git a/packages/backend/src/models/json-schema/meta.ts b/packages/backend/src/models/json-schema/meta.ts
index 2cd7620af0..8ea1cd6eec 100644
--- a/packages/backend/src/models/json-schema/meta.ts
+++ b/packages/backend/src/models/json-schema/meta.ts
@@ -293,10 +293,6 @@ export const packedMetaLiteSchema = {
 			optional: false, nullable: false,
 			default: 'local',
 		},
-		maxFileSize: {
-			type: 'number',
-			optional: false, nullable: false,
-		},
 		federation: {
 			type: 'string',
 			enum: ['all', 'specified', 'none'],
diff --git a/packages/backend/src/server/api/ApiServerService.ts b/packages/backend/src/server/api/ApiServerService.ts
index 32818003ad..c1387ff1f8 100644
--- a/packages/backend/src/server/api/ApiServerService.ts
+++ b/packages/backend/src/server/api/ApiServerService.ts
@@ -51,7 +51,6 @@ export class ApiServerService {
 
 		fastify.register(multipart, {
 			limits: {
-				fileSize: this.config.maxFileSize,
 				files: 1,
 			},
 		});