We reviewed 55 cases of open fracture of the forearm bones had been treated by conservative treatment or open reduction and intramedullary nailing or internal fixation with dynamic compression plate and analyzed the results by wound management and methods of treatment.The results were obtained as follows ;1. In the type I,II and type III-A open fractures, primary closure of the wound was reliable method of treatment. 2. The non-union rate was 44% in the positive culture test and 14.8% in the negative culture test. 3. Immediate internal fixation with dynamic compression plate was reliable method in the treatment of the type I, II open fractures.