Treatment of infected nonunions of long bone is confronted with various difficult problem, e.g. eradication of infection and osseous union even in the presence of devastating infection. To solve this problem various method were proved including exerternal fixation, electrical stimulation and functional casting method with some success. Intreating these difficult infected nonunions, we adopted another program which includes through debridment of the infected and necrotic soft tissue and bone, autogenous bone graft, rigid internal fixation of fragments and ope.n drainage of the wound until union of the fracture. We treated 8 cases of infected nonunions with this method from march, 1980 to september 1983 and results are as follows: 1. Satisfactory union was obtained within average 5 months. 2. In some cases pus drainage continued even after osseous union but it was easily controlled after removal of fixation devices. 3. After bone union and removal of internal fixation devices, some kind of protective measures, e.g. crutches and braces were used for about 6 montes to prevent refracture. 4. In conclusion our method is considered to be an effctive means is treating infected nonunion of fractures.