diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3784172e..8cee362b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/).
 
 - 予約取引のobject.subReservationを最適化
 - 興行オファー承認アクションのobject.acceptedOfferを最適化
+- 決済取引のobject.payActionを最適化
 
 ### Deprecated
 
diff --git a/src/assetTransaction/pay.ts b/src/assetTransaction/pay.ts
index 36502554..e92df3d8 100644
--- a/src/assetTransaction/pay.ts
+++ b/src/assetTransaction/pay.ts
@@ -20,7 +20,6 @@ import { IOnPaymentStatusChanged } from '../project';
 import { IPropertyValue } from '../propertyValue';
 import { PaymentServiceType } from '../service/paymentService';
 
-// 最適化(2022-05-27~)
 export import IAgent = AssetTransactionFactory.IAgent;
 export type IRecipient = IPayRecipient;
 /**
@@ -107,6 +106,7 @@ export interface IAccountsReceivableByServiceType {
     serviceType: string;
     accountsReceivable?: number;
 }
+export type IPayActionInObject = Pick<IPayAction, 'actionStatus' | 'id' | 'typeOf'>;
 /**
  * 取引対象物
  */
@@ -123,14 +123,17 @@ export interface IObject {
     // CreditCardIFのカード通貨区分を追加(2023-08-07~)
     // serviceOutput?: IOrderPaymentMethodIssuedThroughServiceOutput;
     paymentMethod: IPaymentMethod;
+    onPaymentStatusChanged?: IOnPaymentStatusChanged;
     pendingTransaction?: IPendingTransaction;
     entryTranArgs?: IEntryTranArgs;
     entryTranResult?: IEntryTranResult;
     execTranArgs?: IExecTranArgs | IExecTran3dsArgs; // 3DS拡張(2024-01-02~)
     execTranResult?: IExecTranResult | IExecTran3dsResult; // 3DS拡張(2024-01-02~)
     secureTran2Result?: ISecureTran2Result; // 3DS拡張(2024-01-02~)
-    payAction?: IPayAction;
-    onPaymentStatusChanged?: IOnPaymentStatusChanged;
+    /**
+     * PaymentServiceType.MovieTicketの場合、着券アクション
+     */
+    payAction?: IPayActionInObject; // 最適化(2024-04-09~)
     accountsReceivablesByServiceType?: IAccountsReceivableByServiceType[];
 }
 export interface IPaymentMethodWithoutDetail extends IPaymentMethod {