Congenitally corrected transposition of the great arteries is a rare congenital anomaly that can remain asymptomatic until adulthood, especially when there are no other associated congenital anomalies. We report two patients in their sixth decade of life with corrected transposition of the great arteries incidentally diagnosed by transthoracic echocardiography in a preventive medical check-up. The complementary use of cardiac computed tomography confirmed the diagnosis.