A retrospective study of 6 patients with obturator hernia diagnosed before surgery by X-ray and computed tomography (CT) was conducted between 1993 and 2000. The initial CT of the abdomen including the pelvic area revealed incarcerated bowel in the obturator foramen of all 6 patients. All patients underwent laparotomy as soon as possible after CT scans were obtained. Resection of the small bowel was performed in 3 patients, and release of the small bowel was performed in the remaining 3 patients. There were no perioperative deaths. In elderly women who show evidence of small bowel obstruction by abdominal plain x-ray studies, we recommend performing CT scans of the abdomen including the pelvic area for detection of obturator hernia.