Disclosed is a fixing roller which comprises a core 16, a porous material
layer 22 disposed in surrounding relation to an outer peripheral surface
of the core 16, and a thin-walled metal sleeve 26 covering an outer
peripheral surface of the porous material layer 22. The porous material
layer 22 comprises a closed cell-type silicone elastomer. The present
invention provides a fixing roller capable of ensuring enhanced
durability and maintaining a usable state over long periods under the
condition of being actually driven and rotated.