Abstract: This invention comprises a reversible orthopedic brace for the human arm and shoulder, useful for supporting and immobilizing either arm for indefinite periods of time. The brace is simply constructed with improved adjustment and locking means so that it may be adapted for use with either arm. It comprises two or more interconnected harness members to be fastened about the wearer's torso, and which are maintained in parallel relationship and securely joined to form a unitary structure by a hip support assembly, a locking bar assembly and a main support assembly, the latter two assemblies cooperating to receive and adjustably secure an arm support assembly. All elements cooperate to distribute uniformly the weight of the wearer's immobilized arm to the shoulders and torso.