Pain, traumatic arthritis, joint stiffness and joint subluxation are common sequelae of fracture dislocations of the proximal interphalangeal joints of the finger. Many kinds of methods were used to treat fracture dislocation of the proximal interphalangeal joint. The prognosis is greatly influenced by the method and the time of treatment. Authors treated 4 cases of fracture dislocations of the proximal interphalangeal joint with 3 different method. For a case with small bony fragment, we used the extension block splint of McElfresh. For a old case, we used the volar plate arthroplasty mothod of Eaton. And for two cases with large bony fragment, we used the force couple splint method of Agee after open reduction and internal fixation. The results were satisfactory.