The heating apparatus of a surface-heating type, includes a rotary member,
an opposing member that forms a nip with respect to the rotary member,
and a heating member for heating a portion of a rotary member surface
other than the nip, in which temperature used for heating the rotary
member by the heating member is controlled, and a heating material
inserted in the nip to be nipped and conveyed therein is heated using
heat of the rotary member. Accordingly, after insertion of the heating
material in the nip starts, control temperature of the heating member is
increased before the rotary member rotates by one revolution, thereby
preventing an uneven heating phenomenon of the heating material in the
first revolution and the second revolution or later, and preventing
uneven gloss due to the uneven heating phenomenon in the fixing
apparatus.