Partial knee ankylosis is a recognized complication following open operative procedure, trauma and disease processes about the knee. It can result from the formation of intraarticular adhesion and contracture of the capsule as well as the shortening or adhesion of the quadriceps mechanism. In the group of patients who had limitation of the knee motion following total knee replacement, the source of pathology is usually intraarticular adhesion formation. Therefore, intra-articular release of adhesion under arthroscopic control was assumed potentially useful. This is a review of 12 patients (14 cases) who had severe limitatoin of motion in the knee joint following total knee replacement and who were treated by the percutaneous release of adhesion under the arthroscopic control. The following results were obtained. There were one male and eleven females and the ages ranged from 30 to 63 years old (average 46 years old). The interval between total knee replacement and arthroscopic adhesiolysis ranged from 5 months to 28 months (average 11 months). The interval between arthroscopic adhesiolysis and the last follow up evaluation ranged from 1 year to 6 years (average 29 months). The average preoperative knee range of motion was 47.1° and the postoperative range of motion was 110.5. The average final knee range of motion at follow up was 94.4°. So the average loss of motion between postoperative maximum motion and final motion at follow up was 16.1°. In the authors experience, the percutaneous release of adhesion under arthroscopic control, is very useful procedure in the partial knee ankylosis following total knee replacemint, when it was performed early enough.