Duodenal web is a very rare congenital anomaly which usually causes clinical features of intestinal obstruction from early infancy. It shows characteristic findings in the radiologic contrast study or endoscopy. But in the cases with large openings, preoperative diagnosis of web is difficult and often is overlooked until adolescence or adulthood because of delayed onset of symptoms. Duodenal web is usually single near the ampulla of Vater and may be multiple. Only a few cases of double duodenal webs have been reported in the literature. We experienced a case of double duodenal web in a 15 year-old girl who complained of peptic ulcer-associated symptoms including epigastric pain and bloody stool. She had suffered from longstanding abdominal symptoms, malnutrition and iron-deficiency anemia. We propose that duodenal web should be kept in mind for patients with a history of chronic gastrointestinal obstructive symptoms and atypical peptic ulcer.