Abstract: An ostomy appliance in which a collection pouch is provided with an adhesive faceplate, that may be equipped with a convex pressure ring, and in which a relatively stiff belt-attachment ring is interposed between the pouch and faceplate. Despite the stiffness of the belt-attachment ring and that of the convex pressure ring normally in close proximity it, the tab connectors of the attachment ring are readily accessible because the belt-attachment ring is supported in a limited "floating" condition by a thin, highly-flexible, annular web. The web is secured to both the pouch and faceplate along an inner first sealing zone and joins the belt-attachment ring along a second concentric sealing zone spaced a substantial distance outwardly from the first zone.