We address the left atrial posterior wall flap (LAPF) method for the isolated total anomalous pulmonary venous drainage( TAPVD) II a. The postoperative pulmonary venous obstruction( PVO) is a serious complication and is not rare after repair of the isolated TAPVD II a by the conventional surgical techniques. The LAPF method contains superiorities to prevent PVO to the conventional surgical techniques by wider left atrium(LA) - pulmonary vein(PV) communication, less risk of turbulence and no need of a prosthetic patch or an autologous pericardial patch. Furthermore, from a hemodynamic point of view, it makes LA-PV communication a functional preloading chamber which leads the postoperative hemodynamics stable. So, we think that the LAPF method is able to be a standard operative technique for the isolated TAPVD II a.