Arthrodesis is generally recognized and accepted procedure for treatment of severe arthritis of ankle. The number of methods are described in the literature but no one method has been universally accepted because of high complication rates and poor results. Furthermore there are many person whose skin and soft tissue around the ankle joint is in a precarious condition from previous trauma or disease. In these cases, a number of standard technique is unsuitable, so we performed four cases of arthroscopic ankle arthrodesis at Soon Chun Hyang Hospital between April 1989 and February 1990. The follow up period varied from 12 to 22 months. The results were obtained as follows:1. No patients required modification of their footwear. 2. All patient were able to walk independently with a slight limp, and were able to return to their preoperative work. 3. Position of fusion was 3 and 5 degree dorsiflexion than normal, and 7 and 5 degrees plantar flexion than normal. 4. Roentgenographic evidence of fusion occurred in an average of 17.5 weeks with a range of for 12 weeks to 24 weeks. 5. Midtarsal joint movement was less than normal in two patients and more than normal in two patients. 6. In clinical results, the average preoperative score was 34.8, and the average postoperative score was 75. 7. With this arthroscopic approach, no neurologic injuries, infection, or wound problem were observed. Through this study, it was concluded that arthroscopic ankle arthrodesis is a useful procedure in patients with post-traumatic degenerative arthritis, especially when surrounding skin problems exists.