Objective: Hernia repair is a common surgical procedure, and postoperative pain is an inevitable result of hernia surgery. The prevention of postoperative pain is of considerable importance in terms of patient comfort and early discharge. In this study, we evaluated the effects of a peritoneal incision on pain in the early postoperative period.Summary of Background Data: This was a prospective clinical study with 75 patients undergoing inguinal hernia repair. Methods: Patients were divided into five groups: group 1: indirect hernia, Lichtenstein repair with peritoneal incision, group 2: indirect hernia, Lichtenstein repair without peritoneal incision, group 3: all hernias, trans-abdominal preperitoneal(TAPP) repair, group 4: all hernias, total extraperitoneal (TEP) repair, and group 5: direct hernia, Lichtenstein repair with no peritoneal incision. Groups were compared in terms of postoperative pain scores at three different times and complications.Results: There were 62 males and 13 females; their average age was 51.25 years. The visual analog scale (VAS) scores were lower in groups 2, 4, and 5, and there were differences among groups and within each group according to VAS changes assessed at all time points (p < 0.05). There was no difference, according to VAS analysis, between open and laparoscopic surgery groups. There was a difference according to VAS changes in each group between hernia sides (p < 0.001).Conclusion: Peritoneal incision is a significant risk factor for postoperative pain after inguinal hernia repair. But, surgical procedure was not a risk factor although VAS scores were higher in open than laparoscopic surgery.