The shoulder brace for non-surgical treatment includes a strap utilized for reduction, the strap forming a loop made in series by: a section which runs down vertically from the front of the acromioclavicular joint toward the ulnar side of the forearm; a section which runs across a forearm trough; a section which runs up from the radial side of the forearm windingly across the front of the upper arm to the back of the shoulder; and a section which runs across from the back to the front over the shoulder pad and reaches to the acromioclavicular joint part. The shoulder brace for non-surgical treatment is fitted to a patient in the extremity position where the upper arm hangs down, and the strap runs crossly or twistingly to stably retain the reduction.