A fixing apparatus and an image forming apparatus

Provide a fixing device and an image forming apparatus. In the case of half-wave of the halogen lamp heater control, suppress the occurrence of chemical attack. The fixing device includes a fixing roller (183), the fixing roller (183) of the pressing roller (184) and the pressure-contact the fixing roller (183) a plurality of heaters heated by a halogen lamp (186 - 188) includes: temperature temperature (185), the detection of the fixing roller (183) detecting section; and a control unit (10), of a halogen lamp heater (186), based on the temperature detection unit (185) detected temperature is calculated output duty and according to the output duty ratio for controlling the energization or half-wave cut each half wave of the AC waveform, halogen lamp heater (187, 188) on-off control, based on the halogen gas enclosed the concentration of the halogen lamp heater set (186) is lower than the reference voltage halogen lamp heater (187, 188).