Infected nonunion of long bone frequently accompanies with bone loss, because of the outcome of initial trauma or iatrogenic result from sequestra resection. In this study, infected and ununited long bone fracture was treated with internal bone transport technique which was first discribed by G.A. Ilizarov. There were eleven tibial and two femural nonunion. The mean number of admission was 2.8 times; mean number of operation was 8 times; mean duration of average healing index was 1.95 month/cm. All infections were cured and all nonunions were united. Functional result was excellent in 5 cases (of 13 cases), good in 5, fair in 2, and 1 had poor result. Many complication had been observed. All had infection of pin site and pain at least one time, 5 had stiff knee, 9 had stiff ankle, early consolidation(1), delay consolidation(3), tibiofibular synostosis(5), nerve injury(1), refracture after union(1), angular deformity over 5 degree(7), rotational deformity over 10 degree(2).