diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/NodeImporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/NodeImporter.cs
index b0356fd70..df8e4832e 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/NodeImporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/NodeImporter.cs
@@ -8,14 +8,9 @@ namespace UniGLTF
 {
     public static class NodeImporter
     {
-        static int n = 0;
         public static GameObject ImportNode(glTFNode node, int nodeIndex)
         {
             var nodeName = node.name;
-            if (nodeName == "ENDSITE")
-            {
-                nodeName = $"ENDSITE{n++}";
-            }
             if (!string.IsNullOrEmpty(nodeName) && nodeName.Contains("/"))
             {
                 Debug.LogWarningFormat("node {0} contains /. replace _", node.name);
@@ -125,7 +120,7 @@ namespace UniGLTF
                     // invisible in loading
                     renderer.enabled = false;
 
-                    if (mesh.ShouldSetRendererNodeAsBone)
+                    if (mesh.ShouldSetRendererNodeAsBone )
                     {
                         renderer.bones = new[] { renderer.transform };
 
diff --git a/Assets/UniGLTF/Runtime/UniHumanoid/AvatarDescription.cs b/Assets/UniGLTF/Runtime/UniHumanoid/AvatarDescription.cs
index 061c60b4e..233ef9224 100644
--- a/Assets/UniGLTF/Runtime/UniHumanoid/AvatarDescription.cs
+++ b/Assets/UniGLTF/Runtime/UniHumanoid/AvatarDescription.cs
@@ -75,6 +75,57 @@ namespace UniHumanoid
         }
     }
 
+    class UniqueName
+    {
+        HashSet<string> m_uniqueNameSet = new HashSet<string>();
+        int m_counter = 1;
+
+        public void ForceUniqueName(Transform t)
+        {
+            if (!m_uniqueNameSet.Contains(t.name))
+            {
+                m_uniqueNameSet.Add(t.name);
+                return;
+            }
+
+            if (t.parent != null && t.childCount == 0)
+            {
+                /// AvatarBuilder:BuildHumanAvatar で同名の Transform があるとエラーになる。
+                /// 
+                /// AvatarBuilder 'GLTF': Ambiguous Transform '32/root/torso_1/torso_2/torso_3/torso_4/torso_5/torso_6/torso_7/neck_1/neck_2/head/ENDSITE' and '32/root/torso_1/torso_2/torso_3/torso_4/torso_5/torso_6/torso_7/l_shoulder/l_up_arm/l_low_arm/l_hand/ENDSITE' found in hierarchy for human bone 'Head'. Transform name mapped to a human bone must be unique.
+                /// UnityEngine.AvatarBuilder:BuildHumanAvatar (UnityEngine.GameObject,UnityEngine.HumanDescription)
+                /// UniHumanoid.AvatarDescription:CreateAvatar (UnityEngine.Transform) 
+                /// 
+                /// 主に BVH の EndSite 由来の GameObject 名が重複することへの対策
+                ///  ex: parent-ENDSITE
+                var newName = $"{t.parent.name}-{t.name}";
+                if (!m_uniqueNameSet.Contains(newName))
+                {
+                    Debug.LogWarning($"force rename: {t.name} => {newName}");
+                    t.name = newName;
+                    m_uniqueNameSet.Add(newName);
+                    return;
+                }
+            }
+
+            // 連番
+            for (int i = 0; i < 100; ++i)
+            {
+                // ex: name.1
+                var newName = $"{t.name}{m_counter++}";
+                if (!m_uniqueNameSet.Contains(newName))
+                {
+                    Debug.LogWarning($"force rename: {t.name} => {newName}");
+                    t.name = newName;
+                    m_uniqueNameSet.Add(newName);
+                    return;
+                }
+            }
+
+            throw new NotImplementedException();
+        }
+    }
+
     [Serializable]
     public class AvatarDescription : ScriptableObject
     {
@@ -90,12 +141,15 @@ namespace UniHumanoid
 
         public HumanDescription ToHumanDescription(Transform root)
         {
+            var uniqueName = new UniqueName();
             var transforms = root.GetComponentsInChildren<Transform>();
             var skeletonBones = new SkeletonBone[transforms.Length];
             var index = 0;
             foreach (var t in transforms)
             {
                 skeletonBones[index] = t.ToSkeletonBone();
+                uniqueName.ForceUniqueName(t);
+
                 index++;
             }