diff --git a/Assets/VRM10/Runtime/IO/ExpressionExtensions.cs b/Assets/VRM10/Runtime/IO/ExpressionExtensions.cs
index 18bb973eb..402a089c6 100644
--- a/Assets/VRM10/Runtime/IO/ExpressionExtensions.cs
+++ b/Assets/VRM10/Runtime/IO/ExpressionExtensions.cs
@@ -8,13 +8,23 @@ namespace UniVRM10
 {
     public static class ExpressionExtensions
     {
-        public static UniVRM10.MorphTargetBinding Build10(this MorphTargetBind bind, GameObject root, Vrm10Importer.ModelMap loader, VrmLib.Model model)
+        public static MorphTargetBinding? Build10(this MorphTargetBind bind, GameObject root, Vrm10Importer.ModelMap loader, VrmLib.Model model)
         {
-            var libNode = model.Nodes[bind.Node.Value];
-            var node = loader.Nodes[libNode].transform;
-            var mesh = loader.Meshes[libNode.MeshGroup];
-            var relativePath = node.RelativePathFrom(root.transform);
-            return new UniVRM10.MorphTargetBinding(relativePath, bind.Index.Value, bind.Weight.Value);
+            if (bind.Node.TryGetValidIndex(model.Nodes.Count, out var nodeIndex))
+            {
+                var libNode = model.Nodes[nodeIndex];
+                if (libNode.MeshGroup == null)
+                {
+                    return default;
+                }
+                var node = loader.Nodes[libNode].transform;
+                var relativePath = node.RelativePathFrom(root.transform);
+                return new MorphTargetBinding(relativePath, bind.Index.Value, bind.Weight.Value);
+            }
+            else
+            {
+                return default;
+            }
         }
 
         public static UniVRM10.MaterialColorBinding? Build10(this MaterialColorBind bind, IReadOnlyList<MaterialFactory.MaterialLoadInfo> materials)
diff --git a/Assets/VRM10/Runtime/IO/Vrm10Importer.cs b/Assets/VRM10/Runtime/IO/Vrm10Importer.cs
index be77bb089..ace9cb3bf 100644
--- a/Assets/VRM10/Runtime/IO/Vrm10Importer.cs
+++ b/Assets/VRM10/Runtime/IO/Vrm10Importer.cs
@@ -316,7 +316,10 @@ namespace UniVRM10
 
                 if (expression.MorphTargetBinds != null)
                 {
-                    clip.MorphTargetBindings = expression.MorphTargetBinds?.Select(x => x.Build10(Root, m_map, m_model))
+                    clip.MorphTargetBindings = expression.MorphTargetBinds?
+                        .Select(x => x.Build10(Root, m_map, m_model))
+                        .Where(x => x.HasValue)
+                        .Select(x => x.Value)
                         .ToArray();
                 }
                 else
@@ -492,15 +495,17 @@ namespace UniVRM10
                 var fp = vrmExtension.FirstPerson;
                 foreach (var x in fp.MeshAnnotations)
                 {
-                    var node = Nodes[x.Node.Value];
-                    var relative = node.RelativePathFrom(Root.transform);
-                    vrm.FirstPerson.Renderers.Add(new RendererFirstPersonFlags
+                    if (x.Node.TryGetValidIndex(Nodes.Count, out var index))
                     {
-                        FirstPersonFlag = x.Type,
-                        Renderer = relative,
-                    });
+                        var node = Nodes[x.Node.Value];
+                        var relative = node.RelativePathFrom(Root.transform);
+                        vrm.FirstPerson.Renderers.Add(new RendererFirstPersonFlags
+                        {
+                            FirstPersonFlag = x.Type,
+                            Renderer = relative,
+                        });
+                    }
                 }
-            }
             else
             {
                 // default 値を割り当てる