Many examples of congenital anomalies of the pancreatobiliary ductal system are now being found due to the development of new diagnostic techniques. Recently, despite the improvement in diagnosis and management of pancreatobiliary lesions, a lack of knowledge and understanding of these variations is undoubtedly responsible for many problems in medical and surgical management. In particular, drainage of the common bile duct and pancreatic duct at sites other than the second portion of the duodenum is an anatomieal curiosity. We report two cases in this study, of anomalous termination of the common bile duct and the pancreatic duct into the duodenal bulb, diagnosed by an ERCP and a gastroscopy. (Korean J Gastrointest Endosc 18: 637-642, 1998)