Abstract Approximately fifty-three patients with mild to moderate injury to the acromioclavicular joint were treated with the “lever type” of sling described. Sixty-five per cent were simple sprains. Thirty-five per cent were diagnosed clinically and radiologically as mild subluxations. The sprains were immobilized for variable periods ranging from four to fourteen days, or until all tenderness subsided. The subluxations were immobilized for three weeks. No case was hospitalized more than four weeks. All patients were asymptomatic and had a full range of strong, active motion upon discharge to full military duty.