diff --git a/Assets/VRM10/Editor/Components/SpringBone/VRM10SpringBoneDrawer.cs b/Assets/VRM10/Editor/Components/SpringBone/VRM10SpringBoneDrawer.cs
new file mode 100644
index 0000000000..bc9bbbfaad
--- /dev/null
+++ b/Assets/VRM10/Editor/Components/SpringBone/VRM10SpringBoneDrawer.cs
@@ -0,0 +1,119 @@
+using System;
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+
+namespace UniVRM10
+{
+    using static Vrm10InstanceSpringBone;
+
+    [CustomPropertyDrawer(typeof(Spring))]
+    public class VRM10SpringBoneDrawer : PropertyDrawer
+    {
+        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
+        {
+            return EditorGUIUtility.singleLineHeight * 3
+                + EditorGUI.GetPropertyHeight(property.FindPropertyRelative(nameof(Spring.ColliderGroups)))
+                + EditorGUI.GetPropertyHeight(property.FindPropertyRelative(nameof(Spring.Joints)))
+                ;
+        }
+
+        static float DrawProp(Rect rect, SerializedProperty prop)
+        {
+            rect.height = EditorGUI.GetPropertyHeight(prop);
+            EditorGUI.PropertyField(rect, prop);
+            return rect.height;
+        }
+
+        struct GuiEnable : IDisposable
+        {
+            bool Backup;
+            public static GuiEnable Enter(bool enable)
+            {
+                var value = new GuiEnable
+                {
+                    Backup = GUI.enabled,
+                };
+                GUI.enabled = enable;
+                return value;
+            }
+
+            public void Dispose()
+            {
+                GUI.enabled = Backup;
+            }
+        }
+
+        static IEnumerable<VRM10SpringBoneJoint> MakeJointsRecursive(VRM10SpringBoneJoint parent)
+        {
+            if (parent.transform.childCount > 0)
+            {
+                var child = parent.transform.GetChild(0);
+                var joint = child.GetComponent<VRM10SpringBoneJoint>();
+                if (joint == null)
+                {
+                    joint = child.gameObject.AddComponent<VRM10SpringBoneJoint>();
+                }
+                if (joint != null)
+                {
+                    // set params
+                    joint.m_dragForce = parent.m_dragForce;
+                    joint.m_gravityDir = parent.m_gravityDir;
+                    joint.m_gravityPower = parent.m_gravityPower;
+                    joint.m_jointRadius = parent.m_jointRadius;
+                    joint.m_stiffnessForce = parent.m_stiffnessForce;
+
+                    yield return joint;
+                    foreach (var x in MakeJointsRecursive(joint))
+                    {
+                        yield return x;
+                    }
+                }
+            }
+        }
+
+        public override void OnGUI(Rect rect, SerializedProperty property, GUIContent label)
+        {
+            var x = rect.x;
+            var y = rect.y;
+            var w = rect.width;
+            var h = EditorGUIUtility.singleLineHeight;
+            y += DrawProp(new Rect(x, y, w, h), property.FindPropertyRelative(nameof(Spring.Name)));
+            y += DrawProp(new Rect(x, y, w, h), property.FindPropertyRelative(nameof(Spring.ColliderGroups)));
+
+            var joints = property.FindPropertyRelative(nameof(Spring.Joints));
+            y += DrawProp(new Rect(x, y, w, h), joints);
+
+            var enable = joints.arraySize > 0 && joints.GetArrayElementAtIndex(0).objectReferenceValue != null;
+            using (GuiEnable.Enter(enable))
+            {
+                if (GUI.Button(new Rect(x, y, w, h), "create joints to children"))
+                {
+                    if (EditorUtility.DisplayDialog("auto joints",
+                        "先頭の joint の子孫をリストに追加します。\n既存のリストは上書きされます。",
+                        "ok",
+                        "cancel"))
+                    {
+                        var root = (VRM10SpringBoneJoint)joints.GetArrayElementAtIndex(0).objectReferenceValue;
+                        joints.ClearArray();
+                        int i = 0;
+                        // 0
+                        joints.InsertArrayElementAtIndex(i);
+                        joints.GetArrayElementAtIndex(i).objectReferenceValue = root;
+                        ++i;
+                        // 1...
+                        foreach (var joint in MakeJointsRecursive(root))
+                        {
+                            joints.InsertArrayElementAtIndex(i);
+                            joints.GetArrayElementAtIndex(i).objectReferenceValue = joint;
+                            ++i;
+                        }
+                    }
+                }
+            }
+            y += EditorGUIUtility.singleLineHeight;
+
+            y += DrawProp(new Rect(x, y, w, h), property.FindPropertyRelative(nameof(Spring.Center)));
+        }
+    }
+}
\ No newline at end of file
diff --git a/Assets/VRM10/Editor/Components/SpringBone/VRM10SpringBoneDrawer.cs.meta b/Assets/VRM10/Editor/Components/SpringBone/VRM10SpringBoneDrawer.cs.meta
new file mode 100644
index 0000000000..f13927d83f
--- /dev/null
+++ b/Assets/VRM10/Editor/Components/SpringBone/VRM10SpringBoneDrawer.cs.meta
@@ -0,0 +1,11 @@
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+guid: 15a1d8924f711fd46b54b597ff553333
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+  serializedVersion: 2
+  defaultReferences: []
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