Twenty three patients with lateral condylar fracture of humerus ranging in age from 4 to 12 years were treated at Department of Orthopaedic surgery, Saint Benedict Hospital from May 1987 to April 1992. Authors have analyzed all cases of the fracture clinically, especially for the change of carrying angle according to 1) Age at injury, 2) Type of fracture and degree of displacement, 3) Method of treatment, 4) Follow up period. The results were as follows; 1. The age incidence was confined from age of 4 to age of 12. Carrying angle were changed in 16 cases. The change in carrying angle was distributed from 8° decrease to 6° increase at the time of report in comparison with normal one. There were mean decrease of 4.4° in 9 cases and mean increse of 4 in 7 cases, The carrying angle was not changed in 7 cases. 2. In comparison with normal carrying angle, mean change in carrying angle at last follow up were 0.5 decrease. There were no significant differences of outcome between 1) Type of fracture and degrees of initial displacement at the time of injury, 2) Method of treatment, 3) Follow up period, When anatomical reduction and firm internal fixation were performed and normal bone union was achieved. 3. By the criteria of Hardacre, 7 cases (30.4%) showed excellent result, 16 cases (69.6%) showed good result.