The double pylorus is a fistulous communication between the gastric antrum and duodenal bulb. Although its incidence is rare, reports concerning double pylorus are increasing with the recent development of upper gastrontestinal endoscopy. In most instances, it is believed to be a complication of peptic ulcer disease. We recently experienced a case of double pylous in 63- year old male presenting as epigastric pain and melena. Endoscopy revealed an ulcer on the lesser curvature side of gastric antrum and the opening of gastroduodenal fistula within the antral ulcer. We showed the fistula connecting antral ulcer with the duodenal bulb by passing the cathter through it. W e reported this case as a double pylorus accompanied by gastric an- tral ulcer with review of the literature. (Korean J Gastroentero11994; 26: 343 347)