diff --git a/packages/backend/src/core/entities/InstanceEntityService.ts b/packages/backend/src/core/entities/InstanceEntityService.ts
index 7695e6dfa7..87fe8723f8 100644
--- a/packages/backend/src/core/entities/InstanceEntityService.ts
+++ b/packages/backend/src/core/entities/InstanceEntityService.ts
@@ -52,6 +52,7 @@ export class InstanceEntityService {
 			isSilenced: this.utilityService.isSilencedHost(meta.silencedHosts, instance.host),
 			isMediaSilenced: this.utilityService.isMediaSilencedHost(meta.mediaSilencedHosts, instance.host),
 			iconUrl: instance.iconUrl,
+			sidebarLogoUrl: instance.sidebarLogoUrl,
 			faviconUrl: instance.faviconUrl,
 			themeColor: instance.themeColor,
 			infoUpdatedAt: instance.infoUpdatedAt ? instance.infoUpdatedAt.toISOString() : null,
diff --git a/packages/backend/src/core/entities/MetaEntityService.ts b/packages/backend/src/core/entities/MetaEntityService.ts
index 3128b762f4..afeefc9033 100644
--- a/packages/backend/src/core/entities/MetaEntityService.ts
+++ b/packages/backend/src/core/entities/MetaEntityService.ts
@@ -105,6 +105,7 @@ export class MetaEntityService {
 			serverErrorImageUrl: instance.serverErrorImageUrl,
 			notFoundImageUrl: instance.notFoundImageUrl,
 			iconUrl: instance.iconUrl,
+			sidebarLogoUrl: instance.sidebarLogoUrl,
 			backgroundImageUrl: instance.backgroundImageUrl,
 			logoImageUrl: instance.logoImageUrl,
 			maxNoteTextLength: this.config.maxNoteLength,
diff --git a/packages/backend/src/models/Instance.ts b/packages/backend/src/models/Instance.ts
index dd625f95d3..820002c91c 100644
--- a/packages/backend/src/models/Instance.ts
+++ b/packages/backend/src/models/Instance.ts
@@ -139,6 +139,11 @@ export class MiInstance {
 	})
 	public iconUrl: string | null;
 
+	@Column('varchar', {
+		length: 256, nullable: true,
+	})
+	public sidebarLogoUrl: string | null;
+
 	@Column('varchar', {
 		length: 256, nullable: true,
 	})
diff --git a/packages/backend/src/models/Meta.ts b/packages/backend/src/models/Meta.ts
index 07c4e28b3a..a84b6fcc5b 100644
--- a/packages/backend/src/models/Meta.ts
+++ b/packages/backend/src/models/Meta.ts
@@ -127,6 +127,12 @@ export class MiMeta {
 	})
 	public iconUrl: string | null;
 
+	@Column('varchar', {
+		length: 1024,
+		nullable: true,
+	})
+	public sidebarLogoUrl: string | null;
+
 	@Column('varchar', {
 		length: 1024,
 		nullable: true,
diff --git a/packages/backend/src/server/api/endpoints/admin/meta.ts b/packages/backend/src/server/api/endpoints/admin/meta.ts
index 063bb6751b..ed90d3fdde 100644
--- a/packages/backend/src/server/api/endpoints/admin/meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/meta.ts
@@ -102,6 +102,10 @@ export const meta = {
 				type: 'string',
 				optional: false, nullable: true,
 			},
+			sidebarLogoUrl: {
+				type: 'string',
+				optional: false, nullable: true,
+			},
 			app192IconUrl: {
 				type: 'string',
 				optional: false, nullable: true,
@@ -580,6 +584,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				notFoundImageUrl: instance.notFoundImageUrl,
 				infoImageUrl: instance.infoImageUrl,
 				iconUrl: instance.iconUrl,
+				sidebarLogoUrl: instance.sidebarLogoUrl,
 				app192IconUrl: instance.app192IconUrl,
 				app512IconUrl: instance.app512IconUrl,
 				backgroundImageUrl: instance.backgroundImageUrl,
diff --git a/packages/backend/src/server/api/endpoints/admin/update-meta.ts b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
index 6bda1ae6ad..b8b2416b14 100644
--- a/packages/backend/src/server/api/endpoints/admin/update-meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
@@ -53,6 +53,7 @@ export const paramDef = {
 		infoImageUrl: { type: 'string', nullable: true },
 		notFoundImageUrl: { type: 'string', nullable: true },
 		iconUrl: { type: 'string', nullable: true },
+		sidebarLogoUrl: { type: 'string', nullable: true },
 		app192IconUrl: { type: 'string', nullable: true },
 		app512IconUrl: { type: 'string', nullable: true },
 		backgroundImageUrl: { type: 'string', nullable: true },
@@ -242,6 +243,10 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				set.iconUrl = ps.iconUrl;
 			}
 
+			if (ps.sidebarLogoUrl !== undefined) {
+				set.sidebarLogoUrl = ps.sidebarLogoUrl;
+			}
+
 			if (ps.app192IconUrl !== undefined) {
 				set.app192IconUrl = ps.app192IconUrl;
 			}
diff --git a/packages/frontend/src/pages/admin/branding.vue b/packages/frontend/src/pages/admin/branding.vue
index 2e14aef0b9..57abbe4432 100644
--- a/packages/frontend/src/pages/admin/branding.vue
+++ b/packages/frontend/src/pages/admin/branding.vue
@@ -14,6 +14,14 @@ SPDX-License-Identifier: AGPL-3.0-only
 						<template #prefix><i class="ti ti-link"></i></template>
 						<template #label>{{ i18n.ts._serverSettings.iconUrl }}</template>
 					</MkInput>
+					
+					<MkInput v-model="sidebarLogoUrl" type="url">
+						<template #prefix><i class="ti ti-link"></i></template>
+						<template #label>{{ i18n.ts._serverSettings.iconUrl }} (Sidebar/Logo)</template>
+						<template #caption>
+							<div>{{ i18n.tsx._serverSettings.sidebarLogoIconDescriptionhost }}</div>
+						</template>
+					</MkInput>
 
 					<MkInput v-model="app192IconUrl" type="url">
 						<template #prefix><i class="ti ti-link"></i></template>
@@ -128,6 +136,7 @@ import MkColorInput from '@/components/MkColorInput.vue';
 import { host } from '@/config.js';
 
 const iconUrl = ref<string | null>(null);
+const sidebarLogoUrl = ref<string | null>(null);
 const app192IconUrl = ref<string | null>(null);
 const app512IconUrl = ref<string | null>(null);
 const bannerUrl = ref<string | null>(null);
@@ -146,6 +155,7 @@ const manifestJsonOverride = ref<string>('{}');
 async function init() {
 	const meta = await misskeyApi('admin/meta');
 	iconUrl.value = meta.iconUrl;
+	sidebarLogoUrl.value = meta.sidebarLogoUrl;
 	app192IconUrl.value = meta.app192IconUrl;
 	app512IconUrl.value = meta.app512IconUrl;
 	bannerUrl.value = meta.bannerUrl;
@@ -165,6 +175,7 @@ async function init() {
 function save() {
 	os.apiWithDialog('admin/update-meta', {
 		iconUrl: iconUrl.value,
+		sidebarLogoUrl: sidebarLogoUrl.value,
 		app192IconUrl: app192IconUrl.value,
 		app512IconUrl: app512IconUrl.value,
 		bannerUrl: bannerUrl.value,
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 562c498190..10354043fc 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -5191,6 +5191,7 @@ export type operations = {
             infoImageUrl: string | null;
             notFoundImageUrl: string | null;
             iconUrl: string | null;
+            sidebarLogoUrl: string | null;
             app192IconUrl: string | null;
             app512IconUrl: string | null;
             enableEmail: boolean;
@@ -9704,6 +9705,7 @@ export type operations = {
           infoImageUrl?: string | null;
           notFoundImageUrl?: string | null;
           iconUrl?: string | null;
+          sidebarLogoUrl?: string | null;
           app192IconUrl?: string | null;
           app512IconUrl?: string | null;
           backgroundImageUrl?: string | null;