The bowel tract is the most common place site for extra-pelvic endometriosis. 1The symptoms of bloody stool and abdominal pain may correlate with the endometrial cycle; however, only 40% patients would present like this pattern. Among the etiology of complete obstruction of the left side colon, malignancy is usually the cause. Endometriosis is a rare cause of complete colon obstruction of the left side. Initially, treating acute left side colon obstruction with a stoma usually requires a two- or three- stage operation with a temporary diversion. However, one-stage resection and anastomosis is the operation of choice for acute obstruction of the left colon with a low leakage rate. This is a report of one-stage resection with anastomosis in a patient with endometriosis inducing complete colon obstruction.