The Mirizzi syndrome is commonly defined as common hepatic duct obstruction caused by extrinsic compression from an impacted stone in the cystic duct. The treatment of the Mirizzi syndrome has traditionally been surgica1. Some cases of endoscopic treatment of this syndrome with electrohydraulic lithotripsy(EHL) has been recently reported. We experienced a case of the Mirizzi syndrome successfully treated endoscopically with EHL under cholecystoscopic guidance, so report it with a review of the literature. (Korean J Gastroenterol 1995;27:369-374)