diff --git a/src/components/inquiry/RegistForm.tsx b/src/components/inquiry/RegistForm.tsx
index 5cb76b7..862e181 100644
--- a/src/components/inquiry/RegistForm.tsx
+++ b/src/components/inquiry/RegistForm.tsx
@@ -222,6 +222,21 @@ export default function RegistForm() {
               />
             </div>
           </div>
+          <div className="data-input-form-bx">
+            <div className="data-input-form-tit">
+              Customer <i className="import">*</i>
+            </div>
+            <div className="data-input">
+              <input
+                className="input-frame"
+                type="text"
+                placeholder="名前を書いてください"
+                value={session.custNm ?? ''}
+                readOnly={true}
+                id="regUserNm"
+              />
+            </div>
+          </div>
           <div className="data-input-form-bx">
             <div className="data-input-form-tit">電話番号</div>
             <div className="data-input">
diff --git a/src/store/session.ts b/src/store/session.ts
index 2bbebd3..998ac57 100644
--- a/src/store/session.ts
+++ b/src/store/session.ts
@@ -45,6 +45,7 @@ const initialState: InitialState = {
     builderNm: null,
     isLoggedIn: false,
     role: null,
+    custNm: null,
   },
 }
 
diff --git a/src/types/Auth.ts b/src/types/Auth.ts
index c0b3ce2..8a84ac7 100644
--- a/src/types/Auth.ts
+++ b/src/types/Auth.ts
@@ -31,4 +31,5 @@ export interface SessionData {
   builderNm: null | string
   isLoggedIn: boolean
   role: string | null
+  custNm: null | string
 }