A clinical application of the arthroscopy to the three hundred symptomatic knees were performed, and seven knees with a symptomatic seprated suprapatellar bursa were successfully managed and followed by arthroscopic surgery at the Department of Orthopaedic Surgery, Soon Chun Hyang University Hospital from May 1983 to May 1985. The results obtained are as follows; 1. Separated suprapatellar bursa may cause some internal derangement of the knee. 2. The incidence of the separated suprapatella bursa in our view was 5% that is, of 300 symptomatic knees. 3. Separated suprapatellar bursa may have to be excised under arthroscopy.