Abstract: A sheet-mattress retainer particularizing by usage, in a retaining relationship, between a sheet and the taped edge or binding along the edges of a customary mattress. The retainers, used in pairs, face each other on opposite side walls of the mattress and are readily positioned and released due to the resilient properties of such. Since no teeth form part of the finished unit, any puncturing and/or fabric damage is precluded.