Clinical observation was made on 6 cases with Acromioclavicular separation who were treated conservatively at the Department of Orthopaedic Surgery, Pusan National University Hospital. 1) The authors experienced good functional results in those cases with conservative treatment. 2) Closed method is desirable for grade I & II acromioclavicular separation as primary treatment and also, even for grade III depending upon the situation. 3) The authors recommended the convenient Kenny-Howard sling halter as a conservative treatment in Koreans who refuse operation.