The authors present results of the surgical treatment of injury of anterior cruciate ligament in patients over 40 years of age. Surgery was performed by the arthroscopic technique. Autograft was used as the graft material in all knees (patellar ligament, tendon of semitendinosus or gracillis). Seventy-eight patients underwent operation. Fifty-two patients were reviewed one year later. Each patient answered questionare and was evaluated by examiner. The assessment indicates, that one patient did not achieve a satisfactory results. However, this surgical treatment is indicated, because the patients are able to return to active live style.

        Key words: arthroscopy, ACL reconstruction, autograft, middle age