Coronary-pulmonary artery fistula is a rare anomaly in which an aortopulmonary collateral artery arises from a coronary artery, often seen in patients with pulmonary atresia with ventricular septal defect. In the presented case, a coronary-pulmonary artery fistula arose from the left main coronary artery and supplied blood flow to a left upper lobe segment. The life-sized three-dimensional printed model was helpful in pre-surgical planning for unifocalisation of the aortopulmonary collateral arteries.