A fuser apparatus including: a fuser member having an endless contact
surface to be brought into contact with each of successively transported
recording media and a non-contact surface and being arranged to apply
heat to the recording medium from the contact surface to fix a toner on
the recording medium; a heating member energized to supply heat to the
contact surface; a contact surface temperature detecting member for
detecting a temperature of the contact surface; a non-contact surface
temperature detecting member for detecting a temperature of the
non-contact surface; and an energization controlling member for
controling energization power of the heating member; wherein the
energization controlling member controls the heating member energization
power so that the heating member energization power is reduced as a
difference between the non-contact surface temperature and the contact
surface temperature decreases.