diff --git a/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs b/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs
index aace371d0..2b6d643c5 100644
--- a/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs
+++ b/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs
@@ -513,11 +513,7 @@ namespace UniVRM10
             vrm.LookAt = new UniGLTF.Extensions.VRMC_vrm.LookAt
             {
                 Type = lookAt.LookAtType,
-                OffsetFromHeadBone = new float[]{
-                    lookAt.OffsetFromHead.x ,
-                    lookAt.OffsetFromHead.y ,
-                    lookAt.OffsetFromHead.z ,
-                },
+                OffsetFromHeadBone = lookAt.OffsetFromHead.ReverseX().ToFloat3(),
                 RangeMapHorizontalInner = ExportLookAtRangeMap(lookAt.HorizontalInner),
                 RangeMapHorizontalOuter = ExportLookAtRangeMap(lookAt.HorizontalOuter),
                 RangeMapVerticalDown = ExportLookAtRangeMap(lookAt.VerticalDown),
diff --git a/Assets/VRM10/Runtime/IO/Vrm10Importer.cs b/Assets/VRM10/Runtime/IO/Vrm10Importer.cs
index 45eec0bbc..3f6265fa0 100644
--- a/Assets/VRM10/Runtime/IO/Vrm10Importer.cs
+++ b/Assets/VRM10/Runtime/IO/Vrm10Importer.cs
@@ -459,7 +459,7 @@ namespace UniVRM10
                 vrm.LookAt.LookAtType = src.Type;
                 if (src.OffsetFromHeadBone != null)
                 {
-                    vrm.LookAt.OffsetFromHead = new Vector3(src.OffsetFromHeadBone[0], src.OffsetFromHeadBone[1], src.OffsetFromHeadBone[2]);
+                    vrm.LookAt.OffsetFromHead = new Vector3(src.OffsetFromHeadBone[0], src.OffsetFromHeadBone[1], src.OffsetFromHeadBone[2]).ReverseX();
                 }
                 if (src.RangeMapHorizontalInner != null)
                 {