Authors has analyzed 75 cases of the femoral shaft fractures in children, treated by 90-90 skeletal traction methods at Jung Ang Gil General Hospital during last six years, from March 1982 to April 1988. The results were as follows :1. The 90-90 Skeletal traction can be widely applicable to the age group ranging from 3 to 13 years, while other traction methods have a certain age limits. 2. Maintenance of initial reduction snd correction of angular and rotational deformity of femoral shaft fracture were easily achieved. In addition, later angular deformity can also be easily corrected. In angular deformity and instability type, the correction and maintenance of deformity and instability were helped by use of 2 cast slabs. 3. Follow-up observation as well as wound care of open fracture and associated soft tissue injury were relatively easy. 4. The period of immobilization necessory after fracture was not longer than the other methods of treatment, and during treatment, evaluation of bony alignment and union was possible by direct palpation and inspection with out the help of X-ray. 5. The limitation of knee motion as well as circulatory and neurogenic complication were not found. Therefore, these results revealed that 90-90 skeletal traction was the easy, safe and effective method in treatment of femoral shaft fractures in childeren.