Intertrochanteric fractures of the femur usually occur in the elderly and osteoporotic patients. These appear to be increasing in frefuence and are usually unstable. Sixthy two cases were treated ai our hospital from September 1993 through October 1995. 29 elderly patients underwent bipolar hemiarthroplasty and 33 patients underwent internal fixation with compression hip screw(C.H.S). The results were as follows ; 1. Functional results according to hip rating scale of Merle D,Aubiigne was superior in bipolar group. 2. The incidence of postoperative complications was much fewer in bipolar group than in compression hip screw group. 3. In casees of definite osteoporosis with Singhs index below 3 and Evans unstable type frartures, the incidence of mechanical complications was increased, especially in compression hip screw group. 4. There was no siginificant difference between 2 groups in operative time and blood loss.