A 15-year-old girl with ischemic stricture of the jejunum, probably due to microangiopathy caused by diabetes mellitus is presented. Laparotomy revealed two circular strictures in the proximal jejunum, and histology showed ischemic enteritis with ulceration, granulation with microvascular proliferation, inflammatory cell infiltration, marked fibrosis, and hemosiderin deposition. Uncontrolled diabetes mellitus often causes ketoacidosis, increased blood viscosity and platelet aggregation, dehydration in addition to hyperglycemia, and occasionally results in occlusive or non-occlusive vascular disease of the intestine. Ischemic stricture of the bowel in the diabetic state is probably related to moderate ischemia resulting in ulceration and scar formation in the intestine.