Neoplasms of the major duodenal papilla or the ampulla of Vater are rare but are clinically important since they are premalignant. Recently endoscopic snare papillectomy for the ampullary adenoma is being increasingly performed. The procedure is now regarded as a clinically effective treatment, however, various complications such as bleeding, perforation, colangitis, and pancreatitis have been reported. To our knowledge, biliary stricture of this case has not been reported as a complication of endoscopic snare papillectomy for ampullary adenoma. Also, secondary common bile duct stone was formed by biliary stasis associated with biliary stricture in our case. We performed the balloon dilation at the biliary stricture site and could remove the stone successfully by endoscopic method. (Korean J Gastrointest Endosc 2001;23:259-262)