The flexor tendon injuries of the finger are very difficult to treat satisfactorily. Early treatment is desirable, but not always posaible. In addition, joint stiffness and limitation in gliding of the tendon caused by adhesion, make the problem more complex. From 1978 until 1988, 13 patients (14 eases) underwent operations for free tendon graft, and 10 patients (13 eases) for staged tendon graft at the Department of Orthopaedic Surgery, National Medieal Center. They have been followed up for clinical study, and the result was summarized as follows:1. Old flexor tendon injuries were common in the teen and twenties, especially in male. 2. They occurred in the index (10 Cases, 37.0%) and middle (8 cases, 29.6%) fingers most commony, especially zone II (62.9%). 3. The result was evalusted according to the method designed by Strickland and Glovac. In 19 out of 27 cases, satisfactory result (excellent and good) was yielded. 4. In cause, deep laceration by sharp object was better in the result than crushing injury. 5. The interval between the injury and the operation ranged from 1 month through 11 years, averaging 16 months, and is supposed to have little relation to the result. 6. The preoperative state is supposed to have much relation to postoperative result, judging from 100% of satisfactory result in Grade I compared with 40% in Grade V according to Boyes preoperative classification. 7. Little difference is seen in the result between free tendon graft and staged tendon graft. And 5 cases complicated by adhesion, rupture of grafted tendon and wound infection yielded poor result.