diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/BufferAccessor.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/BufferAccessor.cs
index e2a5dab45..8e7ce4b18 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/BufferAccessor.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/BufferAccessor.cs
@@ -169,6 +169,29 @@ namespace UniGLTF
         }
 
         // BoneWeight用
+        public NativeArray<Vector4> GetAsVector4Array()
+        {
+            if (AccessorType != AccessorVectorType.VEC4)
+            {
+                throw new InvalidOperationException("not VEC4");
+            }
+            switch (ComponentType)
+            {
+                case AccessorValueType.FLOAT:
+                    return Bytes.Reinterpret<Vector4>(1);
+
+                case AccessorValueType.UNSIGNED_BYTE:
+                    return ArrayManager.Convert(Bytes.Reinterpret<Byte4>(1), (Byte4 b) => new Vector4(b.x / 255.0f, b.y / 255.0f, b.z / 255.0f, b.w / 255.0f));
+
+                case AccessorValueType.UNSIGNED_SHORT:
+                    return ArrayManager.Convert(Bytes.Reinterpret<UShort4>(1), (UShort4 b) => new Vector4(b.x / 65535.0f, b.y / 65535.0f, b.z / 65535.0f, b.w / 65535.0f));
+
+                default:
+                    throw new NotImplementedException();
+            }
+        }
+
+        // BoneJoint用
         public NativeArray<SkinJoints> GetAsSkinJointsArray()
         {
             if (AccessorType != AccessorVectorType.VEC4)
diff --git a/Assets/VRM10/Runtime/IO/Model/MeshImporter.cs b/Assets/VRM10/Runtime/IO/Model/MeshImporter.cs
index 472c48d41..d27a78e76 100644
--- a/Assets/VRM10/Runtime/IO/Model/MeshImporter.cs
+++ b/Assets/VRM10/Runtime/IO/Model/MeshImporter.cs
@@ -27,7 +27,7 @@ namespace UniVRM10
             var normals = src.VertexBuffer.Normals?.Bytes.Reinterpret<Vector3>(1) ?? default;
             var texCoords = src.VertexBuffer.TexCoords?.Bytes.Reinterpret<Vector2>(1) ?? default;
             var colors = src.VertexBuffer.Colors?.Bytes.Reinterpret<Color>(1) ?? default;
-            var weights = src.VertexBuffer.Weights?.Bytes.Reinterpret<Vector4>(1) ?? default;
+            var weights = src.VertexBuffer.Weights?.GetAsVector4Array() ?? default;
             var joints = src.VertexBuffer.Joints?.GetAsSkinJointsArray() ?? default;
 
             using (var vertices = new NativeArray<MeshVertex>(positions.Length, Allocator.TempJob))