A doorway mounted horizontal bar includes a rod having two ends for attaching to two side moldings of a doorway, two frames attached to the end portions of the rod for supporting a tubular member, and two auxiliary supports each having a lower segment attached to the rod and each having an upper handle attached to the upper end of the frame for being grasped by the user, the lower segments of the auxiliary supports are each attached to the rod with a coupling device, and the handles of the auxiliary supports are each attached to the frame with another coupling device, the coupling devices each include a quick release fastening device for detachably securing the coupling devices and the auxiliary supports to the rod and the frames.