Abstract: A shoulder, forearm, wrist and hand support is disclosed which is formed of rigid material and includes a semi-circular forearm supporting portion shaped to encompass and to exert a constant pressure on the volar surface of the forearm and to provide an edge extending laterally shaped to wrap around and support the ulna, a wrist supporting portion shaped to fit against the inner or volar surface of the wrist and support the wrist in a position of from about 9.degree. to about 21.degree. hyperextension, a hand supporting portion being shaped to fit against the volar surface of the hand, fingers and thumb, and to support the metacarpal-phalangeal joint in a position from about 14.degree. to about 26.degree. flexion, to support the proximal and distal interphalangeal joints in full extension and to hold the thumb in a position from about 29.degree. to about 41.degree. abduction and apposition.