diff --git a/Assets/Scripts/UVC/UIToolkit/Input/UTKDoubleField.cs b/Assets/Scripts/UVC/UIToolkit/Input/UTKDoubleField.cs
index 03e5e527..cd806af8 100644
--- a/Assets/Scripts/UVC/UIToolkit/Input/UTKDoubleField.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Input/UTKDoubleField.cs
@@ -140,8 +140,7 @@ namespace UVC.UIToolkit
             }
         }
 
-        /// <summary>읽기 전용</summary>
-        [UxmlAttribute("is-readonly")]
+        /// <summary>읽기 전용</summary>        
         public new bool isReadOnly
         {
             get => base.isReadOnly;
diff --git a/Assets/Scripts/UVC/UIToolkit/Input/UTKFloatField.cs b/Assets/Scripts/UVC/UIToolkit/Input/UTKFloatField.cs
index 81c1f802..d575692d 100644
--- a/Assets/Scripts/UVC/UIToolkit/Input/UTKFloatField.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Input/UTKFloatField.cs
@@ -151,8 +151,8 @@ namespace UVC.UIToolkit
                 EnableInClassList("utk-float-field--disabled", !value);
             }
         }
-
-        [UxmlAttribute("is-readonly")]
+        
+        /// <summary>읽기 전용</summary>
         public new bool isReadOnly
         {
             get => base.isReadOnly;
diff --git a/Assets/Scripts/UVC/UIToolkit/Input/UTKInputField.cs b/Assets/Scripts/UVC/UIToolkit/Input/UTKInputField.cs
index 593ca750..1e24e084 100644
--- a/Assets/Scripts/UVC/UIToolkit/Input/UTKInputField.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Input/UTKInputField.cs
@@ -161,7 +161,6 @@ namespace UVC.UIToolkit
         }
 
         /// <summary>읽기 전용</summary>
-        [UxmlAttribute("is-readonly")]
         public new bool isReadOnly
         {
             get => base.isReadOnly;
diff --git a/Assets/Scripts/UVC/UIToolkit/Input/UTKIntegerField.cs b/Assets/Scripts/UVC/UIToolkit/Input/UTKIntegerField.cs
index 408409de..d2623051 100644
--- a/Assets/Scripts/UVC/UIToolkit/Input/UTKIntegerField.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Input/UTKIntegerField.cs
@@ -151,7 +151,9 @@ namespace UVC.UIToolkit
             }
         }
 
-        [UxmlAttribute("is-readonly")]
+        /// <summary>
+        /// 읽기 전용
+        /// </summary>
         public new bool isReadOnly
         {
             get => base.isReadOnly;
diff --git a/Assets/Scripts/UVC/UIToolkit/Input/UTKLongField.cs b/Assets/Scripts/UVC/UIToolkit/Input/UTKLongField.cs
index 0fcedfc3..e3194ca4 100644
--- a/Assets/Scripts/UVC/UIToolkit/Input/UTKLongField.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Input/UTKLongField.cs
@@ -137,6 +137,19 @@ namespace UVC.UIToolkit
                 EnableInClassList("utk-long-field--disabled", !value);
             }
         }
+
+        /// <summary>
+        /// 읽기 전용
+        /// </summary>
+        public new bool isReadOnly
+        {
+            get => base.isReadOnly;
+            set
+            {
+                base.isReadOnly = value;
+                EnableInClassList("utk-long-field--readonly", value);
+            }
+        }
         #endregion
 
         #region Constructor