Although pulmonary venous baffle stenosis is not a common late complication after the Senning operation, surgical treatment is vital, when interventional methods fail to correct the pathology. Our patient was admitted to hospital with recurrent epistaxis and exertional dyspnea 6.5 years after the Senning procedure. The gradient in the pulmonary venous baffle was measured as 34 to 35 mmHg via transthoracic echocardiography. During surgical treatment, the calcified and retracted polytetrafluoroethylene flap was completely excised and porcine pericardial xenograft was used to cover the pulmonary venous baffle. At the end of the procedure, no significant gradient was detected via transesophageal echocardiography.