diff --git a/packages/frontend/assets/room/objects/cuboid/cuboid.blend b/packages/frontend/assets/room/objects/cuboid/cuboid.blend
new file mode 100644
index 0000000000..047412115d
Binary files /dev/null and b/packages/frontend/assets/room/objects/cuboid/cuboid.blend differ
diff --git a/packages/frontend/assets/room/objects/cuboid/cuboid.glb b/packages/frontend/assets/room/objects/cuboid/cuboid.glb
new file mode 100644
index 0000000000..2e7377393c
Binary files /dev/null and b/packages/frontend/assets/room/objects/cuboid/cuboid.glb differ
diff --git a/packages/frontend/src/utility/room/object-defs.ts b/packages/frontend/src/utility/room/object-defs.ts
index e86d5e7d38..22136fda13 100644
--- a/packages/frontend/src/utility/room/object-defs.ts
+++ b/packages/frontend/src/utility/room/object-defs.ts
@@ -20,6 +20,7 @@ import { ceilingFanLight } from './objects/ceilingFanLight.js';
 import { chair } from './objects/chair.js';
 import { coffeeCup } from './objects/coffeeCup.js';
 import { colorBox } from './objects/colorBox.js';
+import { cuboid } from './objects/cuboid.js';
 import { cupNoodle } from './objects/cupNoodle.js';
 import { custardPudding } from './objects/custardPudding.js';
 import { debugHipoly } from './objects/debugHipoly.js';
@@ -102,6 +103,7 @@ export const OBJECT_DEFS = [
 	chair,
 	coffeeCup,
 	colorBox,
+	cuboid,
 	cupNoodle,
 	custardPudding,
 	desk,
diff --git a/packages/frontend/src/utility/room/objects/cuboid.ts b/packages/frontend/src/utility/room/objects/cuboid.ts
new file mode 100644
index 0000000000..d2f1ee7b9c
--- /dev/null
+++ b/packages/frontend/src/utility/room/objects/cuboid.ts
@@ -0,0 +1,87 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import * as BABYLON from '@babylonjs/core';
+import { defineObject } from '../engine.js';
+
+export const cuboid = defineObject({
+	id: 'cuboid',
+	name: 'cuboid',
+	options: {
+		schema: {
+			x: {
+				type: 'range',
+				label: 'X',
+				min: 0,
+				max: 1,
+				step: 0.01,
+			},
+			y: {
+				type: 'range',
+				label: 'Y',
+				min: 0,
+				max: 1,
+				step: 0.01,
+			},
+			z: {
+				type: 'range',
+				label: 'Z',
+				min: 0,
+				max: 1,
+				step: 0.01,
+			},
+			color: {
+				type: 'color',
+				label: 'Color',
+			},
+		},
+		default: {
+			x: 0.01,
+			y: 0.01,
+			z: 0.01,
+			color: [1, 1, 1],
+		},
+	},
+	placement: 'top',
+	createInstance: async ({ scene, options, model }) => {
+		const mesh = model.findMesh('__X_BODY__');
+		const mat = model.findMaterial('__X_BODY__');
+
+		const applySize = () => {
+			mesh.morphTargetManager!.getTargetByName('X')!.influence = options.x;
+			mesh.morphTargetManager!.getTargetByName('Y')!.influence = options.y;
+			mesh.morphTargetManager!.getTargetByName('Z')!.influence = options.z;
+			model.updated();
+		};
+
+		applySize();
+
+		const applyColor = () => {
+			const [r, g, b] = options.color;
+			mat.albedoColor = new BABYLON.Color3(r, g, b);
+		};
+
+		applyColor();
+
+		return {
+			onInited: () => {
+
+			},
+			onOptionsUpdated: ([k, v]) => {
+				switch (k) {
+					case 'color':
+						applyColor();
+						break;
+					case 'x':
+					case 'y':
+					case 'z':
+						applySize();
+						break;
+				}
+			},
+			interactions: {},
+		};
+	},
+});