Twenty-six cases of fracture of the femur and tibia on the same leg in twenty-five patients were treated at the Dept. of Orthopedic Surgery, Kyungpook National University Hospital during the period of 1973 to 1979. Twenty-two patients were sustained by the motor vehicle accident. Open fractures of the femur and tibia were ten cases, and closed femur fracture and open tibia fracture were twelve cases. Concomitant Injuries were brain Injury in eight patients and hemorrhagic shock In seven patients. Eight patients were treated by internal fixation (Kuntschernall or Compression plate) on femur and by conservative treatment on tibia. Conservative treatment was done in eleven patients on both femur and tibia fracture. Five patients were amputated. Average healing time of fracture was: twenty-two weeks in femur and twenty-seven weeks in tibia. Functional end results were assessed and rated with satisfactory results In six patients and fair and poor in elght patients respectively.