Among the 85 cases of prosthetic replacement of femoral neck fracture which had been operated at Department of Orthopaedic Surgery, Korea Veterans Hospital from January, 1982 to May, 1990, 32 cases (15 unipolar hemiarthroplasty and 17 bipolar hemiarthroplasty) were examined clinically and radiologically at an average 7.7 years postoperatively. And the results were as follows; 1. The group I (Unipolar hip hemiarthroplasty without cement) had Harris hip score - average 79.4. The group II (Unipolar hip hemiarthroplasty with cement) had Harris hip score average 87.3. The group III (Bipolar hip hemiarthroplasty without cement) had Harris hip score average 80.5. The group IV (Bipolar hip hemiarthroplasty with cement) had Harris hip score average 86. 2. There were 2 cases of stem loosening (13%) among 15 cases in unipolar hip hemiarthroplasty and 1 case (6%) among 17 cases in bipolar hip hemiarthroplasty. 3. The movement of two components in bipolar hip hemiarthroplasty was noted in all cases and the movement of the outer bearing joint was more active than that of the inner. And the movement of the two components was not correlated with the use of cement. But Harris hip score was superior cement stem group to noncement stem group. 4. Unipolar hip hemiarthroplasty showed the similar clinical and radiological results with bipolar hip hemiarthroplasty of femoral neck fracture in the elderly. As a result, unipolar and bipolar hip hemiarthroplasty were considered the proper treatment method of the femoral neck fracture in the elderly.