Abstract: This disclosure pertains to an inflatable air mattress comprised of a plurality of longitudinal inflatable main tubes, adjacent to one another, and interconnected pneumatically by short lengths of hoses, transverse to the longitudinal axis of the main tubes. One valve assembly, used to inflate the entire apparatus, is fastened to one of the main tubes near the bottom of the mattress assembly. Each main tube has fastened to it, at each end thereof, a rubber-like annular ring, cemented within the inner surface of the tubes. A lightweight metallic solid rivet-shaped device has its shaft likewise cemented to the central hole in the rubber-like ring in such a fashion that the shaft end is closest to the center of each main tube. The rivet is adapted with a dome-like cap, at one end, which is external to the end of each main tube. The outermost circular edge of the dome-like cap is coincident with the circular edge corresponding to the outside diameter of the main tube, when inflated.