PURPOSE: We report the results of treatment of the clavicular shaft fractures with Kwires. MATERIALS AND METHODS: We treated 25 cases of clavicular shaft fractures with Kwires from June, 1998 to March, 2000 and analyzed the union period, functional results and complications. RESULTS: Clinical union period was 3.2 weeks, radiologic union period was 8.3 weeks. The functional results were excellent or good in 21 cases(84 %) and there was no delayed or nonunion. CONCLUSION: In the treatment of the clavicular shaft fractures, intramedullary fixation with K-wires is thought to be simple and effective method.