To prevent much releasing agent from dripping to the surface of a fixing roller because the kinematic viscosity of the releasing agent is extremely lowered and to prevent transfer paper from being soiled by the releasing agent by positioning a supply roll part in a place where atmospheric temperature is low on the upside of a fixing roller out of the section of roller width.

The entire supply roll part 18 of the web 11 is arranged on the upside of the fixing roller 1 out of the section B of the roller width A. As a result, the entire supply roll part 18 of the web 11 is positioned in the place where the atmospheric temperature is ≤100°C and the kinematic viscosity of the releasing agent with which the supply roll part 18 of the web 11 is impregnated is not lowered and much releasing agent does not drip to the surface of the roller 1, then the transfer paper is prevented from being soiled by the releasing agent. Or the nearly entire web device including a supply shaft 14, a take-up shaft, the supply roll part 18 and the take-up roll part 19 of the web 11 and a pressing part 12 is arranged on the upside of the roller 1 out of the area B of the roller width A.