Benign multicystic peritoneal mesothelioma is a rare disease that arises from the peritoneal mesothelium. We report on a 52-year-old woman who presented with a large abdominal multicystic mass presumed to be a pancreatic pseudocyst. Laparoscopic exploration revealed a multicystic mass with area of calcification originating from the lesser curvature of the stomach. The whole tumor was successfully excised laparoscopically. Histopathology revealed benign multicystic peritoneal mesothelioma with an area of calcification. Treatment by a minimal access approach allowed the patient to recover rapidly with a short convalescence. Our case confirms the feasibility and safety of a minimal access surgical approach to a rare pathological entity.