The various methods of treatment of the supracondylar fractures of the femur were adapted by many authors according to degree of the involvement of the articular surface, displacement of fragments, degree of comminution and external forces. Authors experienced the supracondylar fracture of the femur in 31 cases who were treated at Koryo General Hospital from March 1984 until March 1988 and among them, 14 cases were treated by operative methods and 17 cases by conservative methods. The results were as follows:1. The male was more common, and the 3rd & 4th decades were most. 2. The most common cause of injuries was traffic accident. 3. The most common fracture type was type I by Neer's classification. 4. The type I was treated mostly by conservative methods and the type II & III by operative methods. 5. In the operative treatments, after anatomical reduction and rigid fixation, the duration of the rehabilitation was shortened by using the C.P.M. exerciser. 6. The complications were partial ankylosis of the knee, chronic osteomyelitis, nonunion and delayed union.