Abstract: Provided is a bed cover device for a bed having a mattress support unit, and a mattress for positioning on the top surface of the support unit. A cover member substantially covers the opposed sides and foot end, and a retention arrangement retains the cover member on the top surface. The cover member has opposed side panel portions, an upper edge extending inwardly from each of the side panel portions, and a lower edge. The upper edge has a foot end part and opposed side parts, for positioning between the mattress and the support unit and retained by engagement with the support unit and the mattress. The retention arrangement has a first stretchable corner bridging element extending between one of the opposed side parts and the foot end part, and a second stretchable corner bridging element extending between the other of the opposed side parts and the foot end part.