diff --git a/Assets/Package/Runtime/Scripts/SortingLayerAttribute.cs b/Assets/Package/Runtime/Scripts/SortingLayerAttribute.cs
new file mode 100644
index 0000000..badc7cc
--- /dev/null
+++ b/Assets/Package/Runtime/Scripts/SortingLayerAttribute.cs
@@ -0,0 +1,6 @@
+using UnityEngine;
+
+namespace HGS.FloatPoint
+{
+  public class SortingLayerAttribute : PropertyAttribute { }
+}
\ No newline at end of file
diff --git a/Assets/Package/Runtime/Scripts/SortingLayerAttribute.cs.meta b/Assets/Package/Runtime/Scripts/SortingLayerAttribute.cs.meta
new file mode 100644
index 0000000..ea05bd6
--- /dev/null
+++ b/Assets/Package/Runtime/Scripts/SortingLayerAttribute.cs.meta
@@ -0,0 +1,11 @@
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