According to an aspect of the present invention, there is provided a fixing device including: a heating roller that generates a heat and is formed to have a mold releasing property; a pressure belt that is brought into contact with the heating roller and is driven according to a rotation of the heating roller; an arm that presses the pressure belt toward the heating roller; and a belt regulating member that contacts an end face of the pressure belt to regulate a shift thereof and is configured to be swingable with respect to the arm.