Background: Benign multicystic mesothelioma occurs predominantly in women of reproductive age. The clinical presentation is varied, from being asymptomatic, an incidental finding during surgery, to lower abdominal pain, abdominal or pelvic mass, or abdominal distension. Case: The case of a 40-year-old woman who presented with chronic pelvic pain caused by benign multicystic mesothelioma is presented. Results: After a 4 cm x 4 cm pelvic mass adherent to the left pelvic side wall, small bowel, and appendix, and obliterating the posterior cul-de-sac, was found through laparoscopy, the procedure was converted to a laparotomy, excision of the pelvic mass, appendectomy, and enterolysis. Pathology confirmed a benign multicystic mesothelioma. Conclusions: Benign multicystic mesothelioma is a rare lesion of uncertain pathogenesis or malignant potential. When diagnosed, complete excision and cytoreductive surgery is required, to avoid local recurrence.