To provide a fixing device which can suppress the occurrence of a temperature droop phenomenon, and to stably peel off a recording sheet from a fixing roll side. There are provided a fixing belt module and a pressure belt module, and the fixing belt module and the pressure belt module are in contact with each other through a fixing belt and a pressure belt in a first nip portion formed on a fixing roll around which the fixing belt is wound and a second nip portion formed on a pressure roll around which the pressure belt is wound.