233 cases with trochanteric femoral fracture were treated by a few operative methods (Jewett nail, Ender nailing, Compression hip screw and others'). 78 cases had stable type fracture and 155 cases unstable, 23 per cent of 101 cases treated with Jewett nail osteosynthesis had fracture complication, particularly penetration of the nail in unstable type. 12 cases with Ender nailing (38%) had severe sliding of the nail and varus deformity of the femoral neck in IVand Vtype. In Vtype, 3 cases with Compression hip screw (23%) had shortening of the femoral neck but they had few complications in ADL. We find the Compression hip screw osteosynthesis suitable for the treatment of trochanteric femoral fracture also of the unstable type.