Double contrast arthrography of the knee is a safe and technically simple procedure permitting accurate diagnosis of the lesion of menisci. From December 1976 to January 1978 the double contrast arthrography of the knee had been performed in 55 patients in the radiologic department of the Yonsei University. The result: 1. 35 cases of 44 showed normal arthrographic findings, in pathology 18 showed rupture of the menisci and 2 suprapatellar bursitis and synovitis. 2. The definite history of trauma was obtained in 14 cases of 18 meniscal injuries 3. Ruptured location were encountered more frequently in lateral menisci than the medial one. (13 cases, 72.2%) 4. In specific type of injury, bucket handle type was the most frequent type in the lateral meniscal injury. (7 cases, 53.8%) 5. Operations were performed on 13 cases of 18 meniscal injuries and all operated cases were to be correct in arthrographic diagnosis.