diff --git a/src/io_scene_vrm/exporter/abstract_base_vrm_exporter.py b/src/io_scene_vrm/exporter/abstract_base_vrm_exporter.py
index 8ed2d8330..04d394c05 100644
--- a/src/io_scene_vrm/exporter/abstract_base_vrm_exporter.py
+++ b/src/io_scene_vrm/exporter/abstract_base_vrm_exporter.py
@@ -167,18 +167,36 @@ def clear_blend_shape_proxy_previews(
         self, armature_data: Armature
     ) -> Iterator[None]:
         ext = armature_data.vrm_addon_extension
-        saved_previews = []
+
+        saved_vrm0_previews: list[float] = []
         for blend_shape_group in ext.vrm0.blend_shape_master.blend_shape_groups:
-            saved_previews.append(blend_shape_group.preview)
+            saved_vrm0_previews.append(blend_shape_group.preview)
             blend_shape_group.preview = 0
+
+        saved_vrm1_previews: dict[str, float] = {}
+        for (
+            name,
+            expression,
+        ) in ext.vrm1.expressions.all_name_to_expression_dict().items():
+            saved_vrm1_previews[name] = expression.preview
+            expression.preview = 0
+
         try:
             yield
         finally:
             for blend_shape_group, blend_shape_preview in zip(
-                ext.vrm0.blend_shape_master.blend_shape_groups, saved_previews
+                ext.vrm0.blend_shape_master.blend_shape_groups, saved_vrm0_previews
             ):
                 blend_shape_group.preview = blend_shape_preview
 
+            for (
+                name,
+                expression,
+            ) in ext.vrm1.expressions.all_name_to_expression_dict().items():
+                expression_preview = saved_vrm1_previews.get(name)
+                if expression_preview is not None:
+                    expression.preview = expression_preview
+
     @staticmethod
     def enter_hide_mtoon1_outline_geometry_nodes(
         context: Context,