To provide a fluid jetting device capable of improving a directing effect.

The fluid jetting device is provided with a turbulence generation means for generating turbulence at a part of the surface of a fountain W. To put it concretely, a dropping nozzle 63 is connected through a discharge pipe 62 to the discharge side of a pulse pump and the dropping port of the dropping nozzle 63 is arranged near the downstream side opening part of a nozzle 31. Then, water drops are dropped from the dropping nozzle 63 to the surface of the fountain W of a laminar flow at a prescribed timing by the drive of the pulse pump. By dropping the water drops, a high luminance part is partially formed on the surface of the fountain W and the high luminance part is moved on the flow of the fountain W. Thus, by adjusting the dropping timing of the water drops, the fountain W full of changes is freely produced.