diff --git a/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableCollider.cs b/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableCollider.cs
index 186d478ef..9bacf616d 100644
--- a/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableCollider.cs
+++ b/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableCollider.cs
@@ -15,5 +15,12 @@ namespace UniGLTF.SpringBoneJobs.Blittables
         // capsule tail or plane normal
         public Vector3 tailOrNormal;
         public int transformIndex;
+
+        public void DrawGizmo(BlittableTransform t)
+        {
+            Gizmos.matrix = t.localToWorldMatrix;
+            Gizmos.color = Color.blue;
+            Gizmos.DrawWireSphere(offset, radius);
+        }
     }
 }
\ No newline at end of file
diff --git a/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableJointImmutable.cs b/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableJointImmutable.cs
index c185dbf43..a4d0b9233 100644
--- a/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableJointImmutable.cs
+++ b/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableJointImmutable.cs
@@ -17,5 +17,12 @@ namespace UniGLTF.SpringBoneJobs.Blittables
         public float length;
         public Quaternion localRotation;
         public Vector3 boneAxis;
+
+        public void DrawGizmo(BlittableTransform t, BlittableJointMutable m)
+        {
+            Gizmos.matrix = t.localToWorldMatrix;
+            Gizmos.color = Color.green;
+            Gizmos.DrawWireSphere(Vector3.zero, m.radius);
+        }
     }
 }
\ No newline at end of file
diff --git a/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableSpan.cs b/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableSpan.cs
index 1d00e351a..425d2a6be 100644
--- a/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableSpan.cs
+++ b/Assets/UniGLTF/Runtime/SpringBoneJobs/Blittables/BlittableSpan.cs
@@ -7,5 +7,7 @@ namespace UniGLTF.SpringBoneJobs.Blittables
     {
         public int startIndex;
         public int count;
+
+        public int EndIndex => startIndex + count;
     }
 }
\ No newline at end of file
diff --git a/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneBufferCombiner.cs b/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneBufferCombiner.cs
index 324ea8d7e..cc4a9da2d 100644
--- a/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneBufferCombiner.cs
+++ b/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneBufferCombiner.cs
@@ -95,5 +95,13 @@ namespace UniGLTF.SpringBoneJobs
                 _combinedBuffer = null;
             }
         }
+
+        public void DrawGizmos()
+        {
+            if (_combinedBuffer is FastSpringBoneCombinedBuffer combined)
+            {
+                combined.DrawGizmos();
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs b/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs
index a87f9b6fd..d6bd83c05 100644
--- a/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs
+++ b/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs
@@ -398,5 +398,27 @@ namespace UniGLTF.SpringBoneJobs
                 logicsIndex += length;
             }
         }
+
+        public void DrawGizmos()
+        {
+            foreach (var collider in _colliders)
+            {
+                collider.DrawGizmo(_transforms[collider.transformIndex]);
+            }
+
+            foreach (var spring in _springs)
+            {
+                for (int i = spring.logicSpan.startIndex; i < spring.logicSpan.EndIndex; ++i)
+                {
+                    var joint = _logics[i];
+                    joint.DrawGizmo(_transforms[joint.tailTransformIndex], _joints[i]);
+
+                    Gizmos.matrix = Matrix4x4.identity;
+                    Gizmos.DrawLine(
+                        _transforms[joint.tailTransformIndex].position,
+                        _transforms[joint.headTransformIndex].position);
+                }
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10FastSpringboneRuntimeStandalone.cs b/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10FastSpringboneRuntimeStandalone.cs
index bef873cf8..e45218ff5 100644
--- a/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10FastSpringboneRuntimeStandalone.cs
+++ b/Assets/VRM10/Runtime/Components/Vrm10Runtime/Vrm10FastSpringboneRuntimeStandalone.cs
@@ -124,7 +124,7 @@ namespace UniVRM10
 
         public void DrawGizmos()
         {
-
+            m_bufferCombiner.DrawGizmos();
         }
     }
 }
\ No newline at end of file
diff --git a/Assets/VRM10/Runtime/FastSpringBone/FastSpringBoneService.cs b/Assets/VRM10/Runtime/FastSpringBone/FastSpringBoneService.cs
index b97b556d7..51a76d887 100644
--- a/Assets/VRM10/Runtime/FastSpringBone/FastSpringBoneService.cs
+++ b/Assets/VRM10/Runtime/FastSpringBone/FastSpringBoneService.cs
@@ -102,5 +102,13 @@ namespace UniVRM10.FastSpringBones
             }
             _fastSpringBoneScheduler.Schedule(deltaTime).Complete();
         }
+
+        public void OnDrawGizmosSelected()
+        {
+            if (enabled)
+            {
+                BufferCombiner.DrawGizmos();
+            }
+        }
     }
-}
+}
\ No newline at end of file