Management of displaced fractures of the acetabulum represents one of the greatest challenges in fracture surgery. The results had been proved to be successful after anatomical reduction and stable internal fixation. The purpose of this study is to analyze the clinical results and complications of open reduction of the displaced acetabular fractures to minimize the complications, and to present suggestions for the treatment of these fractures. We reviewed our experience with 23 displaced acetabular fractures which had been treated by open reduction to evaluate the clinical results and complications. The results were as follows; 1. The most common type of elementary fractures was posterior wall fractures according to Letournel's classification. 2. Excellent or good results were obtained in 88% among the satisfactory reduction group, and it means that accurate reduction was the most reliable factors contributing to successful clinical outcomes. 3. Complications were 1 deep infection, 2 ectopic bone formation, 1 intraarticular hardware, and 1 chondrolysis. 4. In the treatment of displaced acetabular fractures, careful initial assessment using radiograph, angiogram and 3-D CT, appropriate selection of surgical approach and accurate surgical clinical outcome and minimize the complication rate.