To provide an atomizing nozzle with excellent atomization characteristics and an extremely simple structure.

In a nozzle 1 (1a or 1b) for atomization which jets outward gas T introduced into the nozzle as a high speed gas flow Th and atomizes a liquid R discharged from the nozzle 1 (1a or 1b) by mixing outside, the high speed gas flow Th is jetted from a gas jetting hole 201 (201a or 201b) into a tapering-off conical shape being brought to a focus F at a front position of the gas jetting hole 201 (201a or 201b) provided on the nozzle 1 (1a or 1b) and the liquid R discharged from a liquid jetting hole 301 (301a or 301b) formed on the nozzle 1 (1a or 1b) is instantaneously smashed and atomized to range over the center of the liquid column in the focus position F region by the high speed gas flow Th.