The acromioclavicular and coracoclavicular ligament are usually injured by traffic accident or during sports. So, various methods of treatment has been introduced. Fourty four cases of acromioclaviclar and coracoclavicular ligament injuries were admitted and treated at Koryo General Hospital from March 1985 to February 1989. 26 cases were treated by operative method, 18 cases by conservative method in Grade 1, 2 and 3 injuries. The following results were obtained. 1. These injuries were more prevalent in male and more in left side. 2. The most common cause of injuries was traffic accident. 3. Among.44 cases, 13 cases were Grade 1, 9 cases Grade 2 and 22 cases Grade 3 by Allman's classification. 4. 18 cases were treated conservatively and 26 cases operatively. Conservatively treated 18 cases include 15 cases by Kenny-Howard sling and 3 cases by skillful neglect. And operatively treated 25 cases include 12 cases by modified Phemister method(46.2%), 2 cases by modified Bosworth method(7.7%), 2 cases by acromioclavicular plate method(7.7%), 2 cases by Stewart method(7.7%) and one case by Mumford method(3.8%). 5. There were good functional results with the K-wire fixation method after the acurate diagnosis by operative method in the Grade 2 injury. And in the Grade 3 injury we could get the functional results with the modified Phemister method.