Background/Introduction: The da Vinci robotic surgical system was developed to overcome the limitations of conventional laparoscopic surgery. Purpose/Aims: We retrospectively reviewed our experience in performing robot-assisted laparoscopic hernioplasty (RALH) during robot-assisted laparoscopic radical prostatectomy (RALP) based on a single surgeon's experience. Methods: From December 2005 to December 2008, a total of 100 patients with prostate cancer underwent RALPs by a single surgeon. We retrospectively reviewed the medical records and analyzed the patients' ages, body mass indices (BMI), levels of prostate-specific antigen, the biopsy percentage, the Gleason score and clinical stages of the biopsy specimens in 11 patients who had a RALP and a RALH simultaneously. The diagnosis of preoperative inguinal hernia (IH) was based on the results of a clinical physical examination, abdominal computed tomography or magnetic resonance imaging. The postoperative IHs were detected by the appearance of a protruding mass in the inguinal area on coughing, which was noticed during a physical examination. The total operative time, blood loss, type of the hernia, postoperative hospital stay, and the incidence of an IH after a RALP were evaluated. Results: Of the 100 patients, 89 (89%) received a RALP only, 11 underwent a RALP and a RALH simultaneously, 7% had a preoperative IH and 4% had a subclinical IH, which were found during operations. Three patients (3%) developed an IH during follow-up. There were no significant differences between the RALP group and RALP combined with the RALH group in terms of