Abstract: A device for positioning a patient in a chair having a back and arms. The device includes a pad for placement against the patient and a clamp which underlies an arm of the chair and is shiftable along the length of the arm independently of the back. The pad is connected to the clamp by a series of connecting members which permit universal swinging of the pad about a plurality of angularly disposed and laterally spaced axes. The pad also is mounted for shifting laterally of the attaching clamp and the arm to which it is attached and for shifting vertically and horizontally forwardly and rearwardly relative to the chair. Locking mechanism is provided for securing the pad in any of the infinitely selectable positions for the pad to maintain patient positioning within the chair. A similar pad attached to the opposing arm on the chair also may be used to aid in patient positioning.