The clavicular nonunion is uncommon, but when it does occur, it can make many difficult problems. We reviewed 22 patients with nonunion of a clavicular fracture treated by internal fixation and bone graft in our hospital from Octover, 1985 to July, 1991. 19 patients were atropic nonunion, and 3 patients were hypertropic nonunion. Time to follow-up averaged 1 year 4 months (range 8 months to 29 months). The results were as follows; The average duration of radiologic union was 10.5 weeks. Furthermore, the most cammon cause of nonunion was unreduced displaced fragment and the camplications were frozen shoulders in 2 cases, fixation loss in 2 cases and metal failure in 1 case. We recommand that the procedure of choice of symptomatic clavicular nonunion seemed to be rigid internal fixation with plate and 4 or more screws, and bone graft. It provides good stability at the nonunion site and permits early mobilization of patients with excellent funtional results.