The cruciate ligaments are important in providing the anterior and posterior stability and usually associated with other ligament injury of the knee joint, and there are many controversies in its treatment. In general, the primary repair for the acute cruciate ligament injury was good, but some had opposite opinions in the treatment of the isolated anterior cruciate ligament injury. In acute injury, early repair of ligament and in delayed case, the reconstrution surgery of ligament was recommended. For good results, it is very important to give prompt management. Authors studies 23 cases in 16 patients with acute cruciate ligament proper injury who were treated by multiple pull out technique at the department of orthopaedic surgery, Chungnam National University Hospital from April, 1984 to July, 1988. The results were as followings: 1. The incidence was high in active male patients. 2. The most common injury was the traffic and automobile accident. 3. the tibial and femoral attachment were the most common detachment site in anterior and posterior cruciate ligament injury, respectively. 4. Isolated cruciate ligament injury was rare. 5. The results were good in 11 cases(47.8%), especially treated within one week.