Left ventricular diverticulum is a rare congenital anomaly of which the incidence was reported to be 0.26%. Diverticula are usually localized near the apex and most often involve the inferior or anterior parietal walls of the left ventricle. In this report, we describe a rare case of congenital isolated left ventricular apical diverticulum, which was tako-tsubo-like in systole, "dumbbell-like" the whole left ventricle, diagnosed by angiography and magnetic resonance imaging.