Treatment for duodenal Crohn's disease with stenosis were analyzed in 6 cases. There were 3 men and 3 women, and age at onset of duodenal Crohn's disease ranged from 25 to 46 years old. All of them complained of nausea and vomiting, and 4 of them complained of upper abdominal pain. Radiographic examination showed stenosis of the duodenum in all cases, and endoscopic examination showed cobblestone appearance in 3. Endoscopic balloon dilation was attempted in all cases. Two of them were successful, but finally the other 4 required gastro-jejunostomy because of long, fibrous stenosis. Prognosis was good after the operation in all cases.