diff --git a/src/AvatarScene.jsx b/src/AvatarScene.jsx
index 9336bb1..98fb9b8 100644
--- a/src/AvatarScene.jsx
+++ b/src/AvatarScene.jsx
@@ -49,7 +49,7 @@ function RotatingStage({ children, speed }) {
 // マウス操作検知用の共有状態
 const userInteracting = { active: false, timeout: null };
 
-function CameraBreathing() {
+function CameraBreathing({ speed }) {
   const arrivedRef = useRef(false);
 
   useFrame(({ camera, clock }) => {
@@ -65,7 +65,8 @@ function CameraBreathing() {
     // マウス操作中は止める
     if (userInteracting.active) return;
 
-    const t = clock.getElapsedTime() * BREATH_SPEED;
+    const breathSpeed = speed != null ? speed * 7 : BREATH_SPEED;
+    const t = clock.getElapsedTime() * breathSpeed;
     const range = (BREATH_FAR - BREATH_NEAR) / 2;
     const center = BREATH_NEAR + range;
     const dist = center + Math.sin(t) * range;
@@ -134,7 +135,7 @@ export default function AvatarScene({ selectedAnimation: animState, onZoomOut, c
     <Canvas gl={{ alpha: true, antialias: true }}>
       <PerspectiveCamera makeDefault position={CAM_INITIAL_POS} fov={CAM_FOV} />
       <CameraSync />
-      <CameraBreathing />
+      <CameraBreathing speed={camSpeedProp} />
       <CameraDistanceMonitor onDistanceChange={(d) => {
         if (d > ZOOM_OUT_THRESHOLD) onZoomOut?.();
       }} />