Historically, incisionnal hernias and bulky umbilical hernias were closed by direct suturing. These techniques generated a significant number of recurrences (31% to 51%). More recently the prosthetic nets, revolutionized hernia surgery. Their use in this type of surgery then made passed below 10% the rate of recurrence. But it persisted a morbidity related to the wound healing higher than 12%. The development of double layer prostheses allowed the treatment by laparoscopy. These one are feasible, show a low rate of recurrence. The prosthesis is placed in the peritoneum. Parietal morbidity, as well as the postoperative pain is clearly decreased. The recurrence rate is probably the same then by laparotomy. For these reasons we have chosen the laparoscopic technique.