FIXING MEMBER AND HEAT FIXING DEVICE

To provide a fixing member that can perform stable heat fixing even after a long-term use.SOLUTION: A fixing member has a substrate, and a single-layer elastic layer on the substrate; the elastic layer has a thickness of 100 μm or more and contains a binder and a filler; the content of the filler in the elastic layer is 30 volume% or more and 60 volume% or less based on the total volume of the elastic layer; in an area with a thickness of 6 μm from a first surface of the elastic layer facing the substrate toward a second surface on the opposite side of the first surface, the average value of element ratios derived from the filler is 0.0 atom% or more and 6.0 atom% or less.SELECTED DRAWING: Figure 1 【課題】長期に亘る使用によっても安定した熱定着を行うことのできる定着部材の提供。【解決手段】該定着部材は、基体と、該基体上の単層の弾性層とを有し、該弾性層は、１００μｍ以上の厚さを有し、かつ、バインダー及びフィラーを含み、該弾性層の該フィラーの含有量が該弾性層の総体積を基準として３０体積％以上６０体積％以下であり、該弾性層の該基体に対向する側の第１の表面から、該第１の表面とは反対側の第２の表面に向かって厚さ６μｍの領域における該フィラーに由来する元素比率の平均値が、０．０原子％以上６．０原子％以下である。【選択図】 図１