The clinical results of ankle arthrodesis are reviewed. From April 1990 to April 2002, we performed ankle arthrodesis on seven patients. Operations were performed on five patients with rheumatoid arthritis and two patients with osteoarthritis. All arthrodeses were performed by the transfibular approach. The mean follow-up period was 3.8 years. Clinical evaluation was assessed using the Japanese Orthopaedic Assosiation (JOA) scoring system. Both pain and gait scores after the operation markedly improved, and all patients were satisfied with the results. There was no nonunion case. Ankle arthrodesis with transfibular approach is an effective operation in patients with rheumatoid arthritis or osteoarthritis.