A 84-year-old woman underwent aortic root replacement with stentless bioprosthesis and coronary artery bypass grafting. Four years later, she presented with dyspnea. Transthoracic echocardiography revealed aortic regurgitation, dilation and dissection of the sinus of Valsalva. A Bentall operation was performed by using prosthetic graft and bioprosthetic valve. Intimal tear caused the aortic wall dissection and aneurysm of the Freestyle valve.