Benign Multicystic Peritoneal Mesothelioma (BMPM) is a rare abdominal neoplasm predominantly affecting premenopausal females, with fewer than 200 cases reported globally. This case report details a 47-year-old female with no significant medical history who presented with right lower quadrant pain and weight loss. Imaging revealed a multilobulated cystic mass near the gallbladder and kidney, initially suspected to be a complex hepatic cyst. After a thorough evaluation, she underwent a diagnostic laparoscopy followed by surgical resection for definitive diagnosis and treatment. Due to the rarity of BMPM, the case underscores the need for awareness and further investigation into its management.