A patient arm support, a method for using thereof, for supporting an arm of a patient during an operation when said patient is lying in a supine position on an operating table. The patient arm support has a base, an upper surface opposite to the base shaped to receive and to secure onto the patient arm support at least a portion of the arm； a proximal end； a distal end； a groove, running along at least a portion of a length of the upper surface of the patient arm support, for receiving at least one of at least a portion of the arm and a hand joined to the arm.
