Congenital coronary arteriovenous fistula is relatively rare congenital heart disease which has formation of fistula between coronary artery and cardiac ventricle, atrium, or pulmonary artery, but that can be repaired with simple surgical procedure. We experienced three cases of congenital coronary arteriovenous fistula, which were repaired surgically under cardiopulmonary bypass, so we report these cases with review of the literatures.