There is disclosed a fixing apparatus capable of correcting inclined movement of an external heating belt 105 which heats a fixing roller 101 from the outside, in an axial direction of support rollers 103 and 104. A rotary shaft 209 is disposed as a rotation center, and the external heating belt 105 is configured to intersect a generating line of the fixing roller 101. Moreover, the turning shaft 209 is disposed at a position which is offset on an upstream side in a rotating direction of the fixing roller 101. Furthermore, the support roller 104 is positioned on a downstream side in the rotating direction of the fixing roller 101, and both ends of the support roller 104 in the axial direction are movably held, respectively, so that a distance between the centers of the rollers can be variable with respect to the support roller 103.