Although intussusception is always seen in children, its occurrence in adults is an exceptional situation. Postoperative intussusception is uncommon and few cases have been reported in the literature. We present the case of a 51-year-old woman with jejunal postoperative intussusception.  She underwent gastrojejunal anastomosis for pyloric stenosis two weeks earlier. The symptomatology was a bowel obstruction, which was initially thought to be an early postoperative adhesions. The lack of improvement despite medical treatment led to a surgical exploration that helped to the right diagnosis. Intussusception has been related to  jejunal adhesions. Manual reduction was made with removal of adhesions. Postoperative period was uneventful. Adult intussusception is uncommon, often caused by tumors. Early surgical revision is the rule to avoid nutritional impact of a chronic postoperative subocclusion.