Injuries of the acromioclavicular joint in hockey mainly occur after trauma directly to the shoulder joint. E.g. at a fall against the border, onto the ground or in case of a body check. Tossy-III-lesions lead directly to surgery meanwhile type Tossy-II-lesions are mainly treated conservatively. Despite healing of the acromioclavicular ligaments often acromioclavicular joint pain remains despite conservative treatment because of discuss lesions or a osteolysis of the lateral end of the clavicle. The resection of the lateral end of the clavicle with certain pain relief, very good functional results and quick full level participation in hockey has been shown as the method of choice in our patients.