A roller for fixing and an image fixing apparatus using the roller for
fixing that can prevent wrinkles from occurring on a roller surface. The
roller for fixing includes at least an elastic layer on a core metal and
includes a thermal conductive fluororubber latex layer containing a
mixture of fluororubber, fluororesin and thermal conductive fillers more
outer side than the elastic layer, wherein an intermediate layer made of
silicone rubber having higher thermal conductivity than the thermal
conductive fluororubber latex layer is provided between the thermal
conductive fluororubber latex layer and the elastic layer, and the
intermediate layer is configured so that an elastic parameter
Y(=H.times.T) satisfies a relational expression:
Y.gtoreq.4200
where H (degree) is Asker-C hardness of the silicone rubber having higher
thermal conductivity (500 g load) and T (.mu.m) is a thickness of the
silicone rubber having higher thermal conductivity.