diff --git a/.gitignore b/.gitignore
index c78e61598..1e91fb883 100644
--- a/.gitignore
+++ b/.gitignore
@@ -61,4 +61,4 @@ Assets/_Private.meta
 # sphinx build
 public
 *.pyc
-
+.venv
diff --git a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneCollider.cs b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneCollider.cs
index 1dfc772d5..2911a0c96 100644
--- a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneCollider.cs
+++ b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneCollider.cs
@@ -26,5 +26,19 @@ namespace UniVRM10
         public static int SelectedGuid;
 
         public bool IsSelected => GetInstanceID() == SelectedGuid;
+
+        private void OnDrawGizmos()
+        {
+            Gizmos.matrix = transform.localToWorldMatrix;
+            switch (ColliderType)
+            {
+                case VRM10SpringBoneColliderTypes.Sphere:
+                    Gizmos.DrawWireSphere(Offset, Radius);
+                    break;
+
+                case VRM10SpringBoneColliderTypes.Capsule:
+                    break;
+            }
+        }
     }
 }
diff --git a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs
index 69c6075f4..ec0abade2 100644
--- a/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs
+++ b/Assets/VRM10/Runtime/Components/SpringBone/VRM10SpringBoneJoint.cs
@@ -27,14 +27,5 @@ namespace UniVRM10
 
         [SerializeField, Range(0, 0.5f), Header("Collision")]
         public float m_jointRadius = 0.02f;
-
-        public void DrawGizmo(Transform center, Color color)
-        {
-#if UNITY_EDITOR                
-            // Gizmos.matrix = Transform.localToWorldMatrix;
-            Gizmos.color = color;
-            Gizmos.DrawSphere(transform.position, m_jointRadius);
-#endif
-        }
     }
 }
diff --git a/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10Instance.cs b/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10Instance.cs
index 3b0d1dbd8..575cf5104 100644
--- a/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10Instance.cs
+++ b/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10Instance.cs
@@ -103,5 +103,17 @@ namespace UniVRM10
         {
             Runtime.Dispose();
         }
+
+        private void OnDrawGizmos()
+        {
+            foreach (var spring in SpringBone.Springs)
+            {
+                foreach (var (head, tail) in spring.EnumHeadTail())
+                {
+                    Gizmos.DrawLine(head.transform.position, tail.transform.position);
+                    Gizmos.DrawSphere(tail.transform.position, head.m_jointRadius);
+                }
+            }
+        }
     }
 }
diff --git a/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10InstanceSpringBone.cs b/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10InstanceSpringBone.cs
index 24cb1f1d3..98b63e900 100644
--- a/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10InstanceSpringBone.cs
+++ b/Assets/VRM10/Runtime/Components/Vrm10Instance/Vrm10InstanceSpringBone.cs
@@ -37,6 +37,27 @@ namespace UniVRM10
             {
                 Name = name;
             }
+
+            public IEnumerable<(VRM10SpringBoneJoint, Transform)> EnumHeadTail()
+            {
+                for (int i = 0; i < Joints.Count; ++i)
+                {
+                    var head = Joints[i];
+                    if (head == null)
+                    {
+                        continue;
+                    }
+                    for (int j = i + 1; j < Joints.Count; ++j)
+                    {
+                        var tail = Joints[j];
+                        if (tail != null)
+                        {
+                            yield return (head, tail.transform);
+                            break;
+                        }
+                    }
+                }
+            }
         }
 
         [SerializeField]