To provide a nozzle device for pouring molten metal, in which this nozzle is easily manufactured, good machining precision of a slit can be obtd., cleaning is quickly and easily done in the case of clogging of the nozzle, uniform flowing distribution of the molten metal is executed at the time of discharging from the slit, cost is reduced and the slit can easily be exchanged while matching to a prescribed flat shape.

This nozzle device is provided with a nozzle body 16 with steps, in which are provided a molten metal pool 14 and pouring slits 15 so as to avoid facing arrangement, nozzle side plates 18 provided to both side surfaces of the nozzle body and having projecting parts 17 interposed with the pouring slits and forming a prescribed thickness T1 of the molten metal 19, cores 20 which are disposed between the nozzle body and the nozzle side plates and can discharge the molten metal as flat shape, an outer frame 21 including the molten metal pouring nozzle 12 composed of the nozzle body, of the nozzle side plates and of the cores, and wedges 23 to integrally fix the molten metal pouring nozzle and the outer frame 21, and the slit can be exchanged while matching to the flat shape of the discharged molten metal.