The llizarov external fixator with a hinge is useful for treatment of joint contractures and correction of deformities. We use it in the treatment of two cases of fractures around the knee for the purpose of enabling ROM exercise using CPM. Excellent results were obtained in terms of ROM. The construction of the llizarov external fixator with a hinge is complicated and time consuming, so the frame must be preconstructed and disinfected before the operation. During the operation, the hinges should be placed at the estimated center of motion of the knee joint, about 2cm from the articular edge, at the posterior third of the femoral condyle. The actual procedures used in positioning the hinge are demonstrated in detail in this article. We hope for further development and refinement of the hinged distraction llizarov external fixator for application to other joints, specifically the elbow, wrist and ankle.