A 97-year-old woman was referred to our hospital because of constipation and lower abdominal pain. An abdominal CT scan showed extensive intussusception in the transverse colon and she was admitted to the Department of Digestive Medicine in our hospital. There were no ileus symptoms, but the enhancement effect was weak at the leading point of the intussusception. Bowel ischemia was thus suspected. As air reduction was unsuccessful, the patient was referred to our surgical department for surgery. During surgery, a bowel from the ileum end to the cecum had impacted into the ascending colon and the bowel dilatation which reached to the median portion of the transverse colon was seen. Reduction of the intussusception was difficult and right hemicolectomy was performed. The resected specimen revealed wall thickening at the cecum, being suggestive of the presence of a lipoma. However, histopathology revealed the cecum wall thickening to be submucosal edema, vascular dilatation, and a growth of fibroblast which might be caused by changes due to lasting circulatory insufficiency. Accordingly idiopathic intussusception was diagnosed. Her postoperative course was uneventful. Idiopathic intussusception in adults is rare. We have experienced a case of the disease in a very elderly patient. This paper deals with our case with a review of the literature. Key words:very elderly patient,idiopathic intussusception,laparoscopic surgery