A two-substance nozzle for spraying a liquid-gas mixture, including a nozzle housing including at least one liquid inlet leading into a mixing chamber and at least one gas inlet leading into the mixing chamber, a swirl insert, an outlet chamber between the swirl insert and an outlet opening on the downstream end of the outlet chamber, wherein a restrictor is provided on the downstream end of the mixing chamber and an intermediate chamber is provided between the restrictor and the swirl insert.