We experienced the local bone transportation in 3 cases. with a dynamic axial fixator, which had been effected the large bone defects because of the loss of the bony segment or infected non-union. The 2 patients showed the large femoral bone defect after motorcycle accident and the other patient. The tibial infected nonunion with large bone defect. The two femoral bone defects were treated by callotasis, and the tibial bone defect by chondrodiatasis. The size of bony defects were 12.Ocm and 6.5cm and the amount of bony transportation were 10.Ocm, 9.4cm and 5.9cm in orthoroentgenogram. These local bone transportations induced excellent osteogenesls and it filled up the defects We suggest that local bone transportation might be one of the best ways for the treatment of the large bone defects.