diff --git a/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneInstanceBuffers.cs b/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneInstanceBuffers.cs
index 062922101..b93a2b7bc 100644
--- a/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneInstanceBuffers.cs
+++ b/Assets/VRM10/Runtime/FastSpringBone/InputPorts/FastSpringBoneInstanceBuffers.cs
@@ -19,6 +19,7 @@ namespace UniVRM10.FastSpringBones.System
         public NativeArray<BlittableLogic> Logics { get; }
         public NativeArray<BlittableTransform> BlittableTransforms { get; }
         public Transform[] Transforms { get; }
+        public bool IsDisposed { get; private set; }
 
         public FastSpringBoneBuffer(IReadOnlyList<FastSpringBoneSpring> springs)
         {
@@ -132,6 +133,8 @@ namespace UniVRM10.FastSpringBones.System
 
         public void Dispose()
         {
+            if (IsDisposed) return;
+            IsDisposed = true;
             Springs.Dispose();
             Joints.Dispose();
             BlittableTransforms.Dispose();
diff --git a/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneBufferCombiner.cs b/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneBufferCombiner.cs
index afad9ab1e..287802cea 100644
--- a/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneBufferCombiner.cs
+++ b/Assets/VRM10/Runtime/FastSpringBone/System/FastSpringBoneBufferCombiner.cs
@@ -75,6 +75,7 @@ namespace UniVRM10.FastSpringBones.System
             var logicsIndex = 0;
             foreach (var buffer in _batchedBuffers)
             {
+                if(buffer.IsDisposed) continue;
                 var length = buffer.Logics.Length;
                 NativeArray<BlittableLogic>.Copy(_logics, logicsIndex, buffer.Logics, 0, length);
                 logicsIndex += length;