The invention relates to a nozzle for spraying a liquid, especially water in a snow production cannon. The nozzle consists of a cylindrical body (1), a cap nut (2) and a ceramic feating (3) having an axial spraying hole (5). Between the body (1) and the nut (2) a swirl insert (4) is mounted. The insert divides a fluid supply channel (9) having a partition wall (8) with at least two vortex channels (10). The swirl insert (4) has a flange (11) which fixes the insert axially between the nut (2) and the body (1) through a front (12) and a rear (13) o-rings. The front sealing ring (12) is mounted in a rectangular groove made on the face of the swirl insert (4). The rear sealing ring (13) is mounted in a semicircular socket (15) made at the inner comer of the rear surface of the flange (11).