To provide a double fluid nozzle of which the structure can be simplified, the number of components can be decreased, and the maintenance is easy; and to provide a method for spraying a mixed mist.

The double fluid nozzle has a nozzle body 1 accommodating a cylindrical gas supply unit 2 and a cylindrical liquid supply unit 3. A gas supplied through a gas jetting port 2a of the gas supply unit 2 and a liquid supplied through a liquid jetting port 3a of the liquid supply unit 3 are mixed in a mixing space in the nozzle body 1; the resultant gas-liquid mixed mist is ejected through a nozzle tip 7 installed at a delivery port 1a of the nozzle body 1. The gas jetting port 2a and the liquid jetting port 3a are open, facing in the direction reverse to the opening direction of the delivery port 1a of the nozzle body 1; the liquid jetting port 3a is open, facing the gas supply unit 2; and the gas jetting port 2a is open, facing the inner wall of the nozzle body 1.