We report a 34 years old male that while working in forest activities, suffered a blunt trauma caused by the trunk of a tree. On abdominal examination, a bulging on the right upper quadrant with ecchymoses was noted. And abdominal CAT scan showed a great defect of right oblique and transverse abdominis muscles with herniation of the ascending colon. The patient was operated, finding a hemoperitoneum. The abdominal cavity was washed thoroughly and the wall defect was covered with a mesh. The patient had an uneventful postoperative recovery and was discharged nine days later.