Treatment of lateral condyle fracture has been traditionally divided to closed and open treatment. Minimal displaced fracture of lateral humeral condyle can be appropriately treated with closed reduction and percutaneous K-wire fixation. Adherence to these guidelines is likely to prevent malunion, nonunion, premature epiphyseal closure, ulnar neue palsy, and cubitus valgus deformity, all possible complications of this fracture. Since September 1993, we managed 20 children with lateral condyle fracture of elbow using closed reduction and percutaneous pinning. And intraoperative arthrogram was done to confirm the reduction status. Pins were removed 6 weeks postoperatively. The average period of follow-up was 24 months. There was no significant difference in carrying angle, range of motion and physical activity compared to contralateral elbow. Valgus - varus stress view is a useful method in evaluating fracture stability and rupture of cartilage hinges and valgus - supination stress view is very useful for confirming the reduction. Arthrogram was considered to be useful in evaluating the reduction state and deciding the treatment plan.