During the period from January 1987 to May 1988, arthroscopic partial meniscectomy had been performed in 95 knees of 94 patients. Of the 94 patients, there were 66 males and 28 females ranging in age from 10 to 49 years(mean, 27.4 years). The mean follow up period was 22.1 months (range, 15 to 32 months). Both medial and lateral menisci were affected in 6 knees, so 101 menisci were removed. In the group studied, there were 35 tears of medial, 29 tears of lateral and 37 tears of discoid meniscus. In the 101 tears of meniscus, 22 cases of longitudinal tear, 37 cases of bucket handle tear, 19 cases of flap tear, 13 cases of transverse tear, 5 cases of horizontal tear and 5 cases of complex tear were observed. Most frequently associated lesion was ACL injury (9 cases), and 4 cases of loose body and 4 cases of synovial plica syndrome were also found. The sensitivity of diagnosis with physical examination only was 63.6% and improved with arthrography to 70.4%, and with arthrography and CT to 80.0%. Satisfactory result including excellent and good was 76.6% and no major complication was accompanied.