FIXING MEMBER AND HEAT FIXING DEVICE

Provided is a fixing member having excellent heat resistance and durability. The fixing member includes a substrate (3) and an elastic layer (4) on the substrate, wherein the elastic layer includes: rubber, thermally conductive particles (7) dispersed in the rubber, and iron oxide (8) particles dispersed in the rubber, a content of the thermally conductive particles in the elastic layer is 30% by volume or more and 50% by volume or less, a content of the iron oxide particles in the elastic layer is 0.01% by volume or more and 1.0% by volume or less, the thermally conductive particles are at least one selected from the group consisting of aluminum oxide, metal silicon, magnesium oxide, zinc oxide, and silicon carbide, and the iron oxide particles have a localization index M of 0.2 or more and less than 0.8, wherein the localization index M is determined by specific steps.