Device for immobilizing an arm abduction position

A fixing device (1) of an arm, comprising a frame (2) having a lower portion (2a), formed to come in contact with at least a portion of the bust in abdominal zone (A ), the lower portion (2a) being surmounted by an arm support (3) for supporting a forearm in abduction and neutral rotation position, characterized in that the reinforcement (2) comprises an upper part ( 2b) with a support member (4), and a chest strap (6), the shoulder portion (6) cooperating with the support member (4).