Study Objective: To determine the frequency of incisional hernias after laparoscopic gynecologic surgery. Design: Retrospective chart review of 2635 cases undergoing laparoscopic gynecologic surgery from 1993 to 2008. Setting: A practice and teaching hospital. Patients: Twenty six hundred thirty-five women with laparoscopic gynecologic surgery. Intervention: All patients underwent herinorrhaphy by laparotomy or by laparoscopy. Measurements and Main Results: A total of six incisional hernias through the laparoscopic trocar site were found over 16 years, a frequency of about 0.22%. Incisional hernias occurred following laparoscopic hysterectomy in three patients, laparoscopic myomectomy in one patient and laparoscopic oophorectomy in two patients. Small intestine herniated in five women and omentum herniated in one. The hernias appeared from 2 days to 10 days postoperatively. All women required surgery to retract the entrapped bowel or omentum and underwent herniorrhaphy by laparotomy (three cases) or by laparoscopy (three cases). Five occurred on left lower entry point in which the underlying fascia was not closed, suggesting that they were most likely related to the extensive procedures through this cannula. In one case of 91-year old woman, hernia occurred in umbilicus although the fascia defect was closed. Conclusion: To eliminate this complication, the underlying fascia should be carefully closed when extensive procedures are performed through a cannula port and when the women are old-aged.