The authors have experienced five cases of general anesthesia for repair of diaphragmatic hernia in children, and following results were obtained. Whether it was congenital or traumatic in origin, prompt reduction and repair is desirable if accurate diagnosis was made and patients condition was acceptable, for increased postoperative survival rate and prevention of possible complications. When the intermittent positive pressure breathing was needed during preoperative, intraoperative or postoperative period, the greatest concern of anesthetist is that excessive positive ventilation should be avoid. The most important factors in this situation probably are the use of chest drainage, daily Roentgen-ray examination, and better use of postoperative ventilatory assistance, for prevention of postoperative atelectasis and other pulmonary complications.