A fixing apparatus transports a recording medium carrying a developer image on it and heats the developer image to fix into the recording medium. A heat roller extends in a direction of its rotational axis and generates heat. An endless belt is loosely entrained on a belt guide. A pressurizing mechanism engages the endless belt from inside and urges the endless belt against the first rotating body. When the rotating body rotates, the endless belt and the second rotating body are driven in rotation in such a way that the recording medium is pulled in between the first rotating body and the endless belt.