Various methods for the treatment of fracture of the femur neck including total hip arthroplasty have been developed and performed, but it is still called the "unsolved fracture" in certain situations. The role of bipolar hemiarthroplasty as primary treatment of fracture of the femur neck, however, continues to be controversial. The authors reviewed and analysed 38 cases of cementless bipolar hemiarthroplasty in patients between the ages of 51 and 69 at the Department of Orthopaedic Surgery, Chosun University, during the period from January, 1989 to December, 1994. The purposes of the study were to analyse the clinical and radiological results and to detect the motions of bipolar cup. At the average 38 months follow up, 31 (81.6%) of the patients were satisfied by Lunceford methods. But, 24 (63.2%) of the patients suffered from inguinal area pain and discomfort while they resumed their normal Korean life-styles. As time elapsed, the amount of the outer bearing motion was more than that of the inner bearing motion. the acetabular erosion were present in 2 patients.