The authors has been reviewed the 123 cases, 119 patients of ankle fracture that were treated through the admission and outpatient Department of Orthopedic Surgery, Chungnam National University, from September, 1974 to January, 1982. The summary of the' results were follows: l. Among the 123 cases, male was 94 cases(76.4%), female was 29 cases, and the average age of the patients was 34.9 years. 2. The causes of the injury was traffic accidents, fall or slip downs and sports injuries in orders. 3. By the Lauge-Hansens classification, pronation-external rotation ty'pe and supination-adduction type were more common than the others. 4. Open reduction and internal fixation were more commonly used in its treatment than that of the closed method. 5. The better radiological assessment could be achieved by. obtaining the anatomical reduction and the reduction was more satisfactorily by the use of the key role of the lateral malleolus. 6. The overall results were more supported by the radiological results than the clinical results.