From October 1987 through March 1991, 58 patients with postoperative joint stiffness underwent arthroscopic fibroarthrolysis. Forty-six knees in 46 patients were followed. The indication for arthroscopic management was decreased range of motion after surgery. Eighty-seven percent had been treated by arthrotomy. Thirteen percent had been managed by arthroscopic surgery. The indication for primary surgery was a torn anterior cruciate ligament in 74%. The mean interval between arthroscopic fibroarthrolysis and follow-up was 22.1 months. The average age was 32.7 years. A modified Blauth and Jäger score was used for classification of fibroarthrosis: grade I (mild 17.4%), grade II (moderate 63%), grade III (severe 15.2%), and grade IV (bad 4.3%). The gain in range of motion was evaluated by the Cauchoix index: the results were excellent in 54.5%, good in 21.7%, and fair and poor in 23.8%. Pain was evaluated according to a modification of the Lysholm score: 80.4% of the patients experienced a reduction in pain. The sports activity level in the Tegner activity scale increased from 2.3 to 4.8. Patient satisfaction was excellent or good in 56.5% (n = 26), fair in 39.1% (n = 18), and poor in 4.3% (n = 2). On the basis of our retrospective study, we feel that arthroscopic fibroarthrolysis is of benefit to the patients with postoperative joint stiffness even after a prolonged period.