The clinical diagnosis of obturator hernia is difficult because of its uncommon incidence, deep location, and infrequent specific sign or symptoms. Recently we have ewperienced 2 cases of obturator hernia, exactly diagnosed preoperatibely by CT scan in elderly debilitated women presenting with small bowel obstruction sign. CT diagnosis was based on demonstration of herniated bowel loop through the obturator canal located between the pectineus and the external obturator muscle. CT scan is indicated when there is small bowel obstruction with unclear cause in old aged woman.