Abstract: A silicone sponge roller for a fixing device, includes a roller substrate, a silicone sponge layer formed on the roller substrate, and a surface layer including formed of a fluorocarbon resin formed on the silicone sponge layer. The silicone sponge layer is a foam including a silicone rubber and air bubbles formed from microballoons scattered in the silicone rubber. The silicone sponge layer includes air permeating through holes aligned along the axis direction of the roller substrate, opening to both end surfaces of the silicone sponge layer. The air bubbles exist in the periphery of the through holes, and at least a part thereof is positioned in the inner surface of the through hole.

Abstract: Disclosed is a fixing roll, comprising a core metal, a heat resistant elastic layer formed to cover the circumferential outer surface of the core metal, and a surface layer formed to cover the circumferential outer surface of the heat resistant elastic layer, the surface layer being formed of a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin film of a double layer structure consisting of an inner layer having a volume resistivity of 10.sup.11 .OMEGA..cm or less and an outer layer having a thickness falling within a range of between 3 .mu.m and 50 .mu.m, and the entire thickness of the resin film falling within a range of between 20 .mu.m and 500 .mu.m.