Obturator hernia is a rarely seen disease that frequently affects females and the elderly population. It is clinically characterized with pain generally involving the hip region, and unless suspected, its diagnosis is difficult. Another reason for pain in the hip region and orthopedic surgery is coxarthrosis. The patient should be evaluated in detail radiographically and clinically before surgery. Although preoperative clinical examinations and radiographic findings support the indication for orthopedic surgery performed due to coxarthrosis, the probability of the presence of other pathologies accompanying the present disease should not be forgotten. In this article, we report an obturator hernia incidentally diagnosed in a 65-year-old female patient who was performed total hip arthroplasty due to coxarthrosis.