Introduction: Bouveret's syndrome is a rare cause of pylorus or duodenal obstruction. This syndrome represents only 1-3% of all cases of gallstone ileus, more frequent in women and in the elderly. The clinical presentation is quite nonspecific, but in most cases the symptomatology suggests an upper digestive obstruction.Case Report: We report a case of a 46-year-old man admitted with upper digestive obstruction due to a large biliary calculus that eroded through the gallbladder's wall and pylorus, leading to digestive obstruction at this level. After attempted and unsuccessful endoscopic therapy, the patient was treated by surgery, with gastrotomy and gallstone removal. The fistula between the gallbladder