A 53-year-old woman with abdominal pain and bloody stool was found in barium enema studies to have a tumor in the cecum. Colonoscopy and abdominal computed tomography showed ileocolic intussusception resulting from cancer of the terminal ileum. At laparotomy, we conducted ileocecal and lymph node dissection after manually reducing the intussusception. The 8×4×1cm tumor was located in the ileum 12cm proximal to the ileocecal valve and showed laterally spreading growth. Pathological diagnosis was well differentiated adenocarcinoma infiltrating to the submucosal layer. We review 12 cases of early ileal cancer reported in Japan and analyze them together with our case.