The efficacy of intramedullary nailing in treating patients who have fractures of the femoral shaft has been well established. The nailings are currently extended for use with this technique for distal fixation. Fifty-five fractures of the distal half of the femur (fifty-five patients) were randomized to treat with interlocking nail with either the Brooker-Wills nail(thirty-two fractures) or the Russell-Taylor nail(twenty-three fractures), who were treated at Department of Orthopaedic Surgery, Soonchunhyang University Hospital from May, 1988 to November, 1991. Fifty-five patients had acute traumatic fractures of the distal half of the femur with no other significant injuries. Patient with other injuries which would interfere with functional evaluation were excluded. We followed and analyzed the progress of the fracture and functional recovery were assessed clinically and radiologically. The results were as follows; 1. Among the 55 patients, 51 patients were male and 4 patients were female. The average age was 32.1 years and third decade was most common. 2. The most common cause of distal femoral fractures was traffic accident in 47 cases (85%). 3. The average time to fracture union healing was 3.8 months for Brooker-Wills nailing and 3.7 months for Russell-Taylor nailing. 4. The average time of the operation was 119 minutes for Brooker-Wills nailing and 132 minutes for Russell-Taylor nailing. The average estimated loss of blood was 534 ml for Brooker-Wills nailing and 578ml for Russell-Taylor nailing. 5. In recovery of knee joint to full range of motion, cases of Brooker-Wills nailing were resulted in the early recovery of knee motion than those of Russell-Taylor nailing. 6. The complications including shortening and angulation deformity were greater in Brooker-Wills nailing than those in Russell-Taylor nailing. 7. In functional results to recover above good result, cases of Russell-Taylor nailing (83%) were better than those of Brooker-Wills nailing (78%).