To solve the problem that failures of impairing the assemblage workability of a press roller to a fixing apparatus may occur when using an E ring in a structure positioning the press roller in an axial direction.

In the fixing apparatus 1, guide parts 10 and 10 for controlling the shift of each bearing 8 in a paper transporting direction A and guiding the shift of the bearing 8 along the expansion/contract direction B of a spring 9 are formed in a 2nd casing 22, and also, a rib 10b projecting toward the bearing 8 is formed on the guide part 10 so that the guide parts 10 and 10 and the bearing 8 may freely slide in the direction B and also the guide parts and the bearing 8 may engage one another in the axial direction, and also, a groove 8d for inserting the rib 10b is formed in the bearing 8.