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Most cases of adult intussusception are caused by neoplastic lesions, and idiopathic adult intussusception is very rare. We present a case in which laparoscopic surgery was performed for idiopathic adult intussusception initially reduced by colonoscopy. A 53-year-old woman presented to the emergency department of our hospital with intermittent lower abdominal pain. Contrast-enhanced computed tomography and ultrasonography of the abdomen showed a concentric structure in the ascending colon. We diagnosed intussusception. Colonoscopy achieved successful reduction before surgery. Twelve days after this reduction, laparoscopic surgery was performed. Histopathological examination did not reveal any causative pathology; therefore, idiopathic adult intussusception was diagnosed. The postoperative course was uneventful, and the patient was discharged on postoperative day 14. Preoperative colonoscopy should be utilized to diagnose the main lesion and may be useful for reducing adult intussusception. Laparoscopic surgery is both minimally invasive and safe and can be performed following endoscopic reduction.