diff --git a/packages/frontend/assets/room/objects/icosahedron/icosahedron.blend b/packages/frontend/assets/room/objects/icosahedron/icosahedron.blend
new file mode 100644
index 0000000000..5117ea7ce4
Binary files /dev/null and b/packages/frontend/assets/room/objects/icosahedron/icosahedron.blend differ
diff --git a/packages/frontend/assets/room/objects/icosahedron/icosahedron.glb b/packages/frontend/assets/room/objects/icosahedron/icosahedron.glb
new file mode 100644
index 0000000000..9f626156b5
Binary files /dev/null and b/packages/frontend/assets/room/objects/icosahedron/icosahedron.glb differ
diff --git a/packages/frontend/src/utility/room/object-defs.ts b/packages/frontend/src/utility/room/object-defs.ts
index 9f9c29b7fa..3e654de9bb 100644
--- a/packages/frontend/src/utility/room/object-defs.ts
+++ b/packages/frontend/src/utility/room/object-defs.ts
@@ -31,6 +31,7 @@ import { energyDrink } from './objects/energyDrink.js';
 import { envelope } from './objects/envelope.js';
 import { facialTissue } from './objects/facialTissue.js';
 import { hangingTShirt } from './objects/hangingTShirt.js';
+import { icosahedron } from './objects/icosahedron.js';
 import { keyboard } from './objects/keyboard.js';
 import { laptopPc } from './objects/laptopPc.js';
 import { lavaLamp } from './objects/lavaLamp.js';
@@ -104,6 +105,7 @@ export const OBJECT_DEFS = [
 	envelope,
 	facialTissue,
 	hangingTShirt,
+	icosahedron,
 	keyboard,
 	laptopPc,
 	lavaLamp,
diff --git a/packages/frontend/src/utility/room/objects/icosahedron.ts b/packages/frontend/src/utility/room/objects/icosahedron.ts
new file mode 100644
index 0000000000..0f89007a74
--- /dev/null
+++ b/packages/frontend/src/utility/room/objects/icosahedron.ts
@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { defineObject } from '../engine.js';
+
+export const icosahedron = defineObject({
+	id: 'icosahedron',
+	name: 'icosahedron',
+	options: {
+		schema: {},
+		default: {},
+	},
+	placement: 'top',
+	createInstance: () => {
+		return {
+			interactions: {},
+		};
+	},
+});