A fixing apparatus includes a hot roller, a fixing roller, a fixing belt that extends between the fixing roller and the hot roller and revolves, a pressure roller that is pressed against the fixing roller via the fixing belt, and forms a nip region between the pressure roller and the fixing belt, and at least one non-contact temperature sensor that detects a temperature of the fixing belt. Light having variable frequency within a range of frequencies is propagated along the fiber optic cable. The load floor has a wood grain finish. The fixing plate includes a main body, a second spring fixing portion, an interface card connector fixing portion, and a protruding portion.