PURPOSE: To fix surely a developer with a lower pressure in a small-sized device, by fixing it with a pressure in the state where the first compression elastic modulus of a recording material for toner fixing is higher than the second compression elastic modulus of a fixing member having a elastic layer.

CONSTITUTION: A press roller 2 is a metallic roller, and a fixing roller 1 has an elastic member 11 having a thickness (t). In case that a linear pressure of 5W 200kg/cm is applied to the elastic member to fix a toner, an elastic material having a compression elastic modulus lower than that of a recording material for application of a pressure higher than the deformation limit pressure of the toner image is provided on the surface of the roller to obtain a uniform fixability. A silicone rubber, an urethane rubber, an urethane elastomer, a low density polyethylene, middle and high density polyethylenes, a nylon, or the like is used as materials of the elastic layer.