PROBLEM TO BE SOLVED: To jet two fluids in a wide angle fan-shaped spraying pattern from a two-fluid nozzle.SOLUTION: The front end of a liquid flow channel and the front end of a gas flow channel are provided on both the sides, in the longitudinal direction, of a two-fluid nozzle, these front ends being opposite to each other across a partition wall. In addition, a slit-shaped gas-jetting opening is provided, which is cut, in the circumferential direction, into the outer peripheral wall of the nozzle on the front end side of the gas flow channel. On the other hand, a liquid-jetting opening, which is provided on the front end side of the liquid flow channel, is arranged so that a gas jetted from the gas-jetting opening may externally collide with a liquid jetted from the liquid-jetting opening to make them mixed together, and, in this case, the jetting width of the gas, which is jetted from the gas-jetting opening, is set to be larger than the jetting width of the liquid which is jetted in a fan form from the liquid-jetting opening.
