A fixing device includes a fixing member, a pressing member, a charger and an air discharging device. The fixing member is rotatably provided and heated by a heat source. The pressing member is rotatably provided and brought into pressure contact with the fixing member to form a fixing nip through which a sheet having a toner image is passed. The charger is disposed to oppose to the fixing member and applies an electric charge of the same polarity as a toner constituting the toner image to a surface of the fixing member. The air discharging device discharges an air flow passed between the fixing member and the charger via a filter.