We reviesed 4 patients with clavicular non-union who were treated by internal fixation with semitubular plate and iliac bone graft from Jan. 1984. to Oct. 1988. All 4 Patients had fractures at middle 1/3 of the clavicle. We have defined a non-united clavicular fracture as one that has not demonstrated healing at post-trauma 4 months. All 4 patients had symptoms due to non-union. All 4 patients were treated with semitubular plating and bone graft and achieved good union by average 9.8 weeks post-operatively and symptoms were disappeared. We might conclude that symptomataic non-union of the mid-clavicle could be treated with operative method and rigid internal fixation with semitubular plating and bone graft will be excellent method.