A fixing device comprising a nozzle unit that sprays a fixing solution to a sheet on which a toner image is formed, and provided to fix the toner image on the sheet, wherein the nozzle unit comprises: a housing capable of accommodating the fixing solution; a nozzle electrode (23, 30, 40, 50, 60 70) located inside the housing and extending in a first direction; and a plurality of nozzles provided to discharge the fixing solution electrically charged by the nozzle electrode from the housing, aligned along the first direction, and comprising a first nozzle and a second nozzle located at an interval from the first nozzle in the first direction, and a length of the nozzle electrode in the first direction is greater than the interval between the first nozzle and the second nozzle in the first direction wherein: the housing has a first hole allowing the fixing solution to enter the first nozzle and a second hole allowing the fixing solution to enter the second nozzle; characterised in that: the nozzle electrode has a first notch allowing the fixing solution to enter the first hole and a second notch allowing the fixing solution to enter the second hole; a diameter of the first notch is smaller than a diameter of the first hole, and a diameter of the second notch is smaller than a diameter of the second hole. wherein the nozzle unit comprises: a housing capable of accommodating the fixing solution; a nozzle electrode (23, 30, 40, 50, 60 70) located inside the housing and extending in a first direction; and a plurality of nozzles provided to discharge the fixing solution electrically charged by the nozzle electrode from the housing, aligned along the first direction, and comprising a first nozzle and a second nozzle located at an interval from the first nozzle in the first direction, and a housing capable of accommodating the fixing solution; a nozzle electrode (23, 30, 40, 50, 60 70) located inside the housing and extending in a first direction; and a plurality of nozzles provided to discharge the fixing solution electrically charged by the nozzle electrode from the housing, aligned along the first direction, and comprising a first nozzle and a second nozzle located at an interval from the first nozzle in the first direction, and a length of the nozzle electrode in the first direction is greater than the interval between the first nozzle and the second nozzle in the first direction wherein: the housing has a first hole allowing the fixing solution to enter the first nozzle and a second hole allowing the fixing solution to enter the second nozzle; characterised in that: the nozzle electrode has a first notch allowing the fixing solution to enter the first hole and a second notch allowing the fixing solution to enter the second hole; a diameter of the first notch is smaller than a diameter of the first hole, and a diameter of the second notch is smaller than a diameter of the second hole. the nozzle electrode has a first notch allowing the fixing solution to enter the first hole and a second notch allowing the fixing solution to enter the second hole; a diameter of the first notch is smaller than a diameter of the first hole, and a diameter of the second notch is smaller than a diameter of the second hole.