8 cases of congenital coronary artery fistula of child age group, diagnosed by cineangiography and confirmed by operation at Seoul National Univ. Hospital in recent 9 years were analysed. SUMMARIES : 1. The overall incidence was 0.18% of those who underwent cardiac cineangiography. 2. Age distribution was from 3 months to 14 years. 3. Important physical findings were continuous murmur and ischemic change in EKG. 4. Chest X-ray findings were non-specific but mild cardiomegaly and normal pulmonary vascularity. 5. In cinecardiography, origin of coronary artery fistula was right in 1 case and single left coronary artery in 1 case. 6. Associated anomalies were singlecoronary artery in 1 case, ASD in 1 case and VSD in 1 case. 7. For accurate diagnosis of congenital coronary artery fistula, biplane cineangiography is an essential procedure.