To provide a gas jetting nozzle device capable of visually and precisely recognizing a gas jetting position without making the device large-sized and complicated to jet a gas to a desired place accurately at a pinpoint.

The gas jetting nozzle device is structured so that a gas is jetted to a place to be irradiated with a colored visible laser beam 11 by incorporating a laser beam oscillator 2 for emitting the laser beam passed through the center line of the a gas jetting route from a jetting port 3 in the nozzle 1. As the laser oscillator 2, a laser pointer using red laser or green laser is used.