Disclosed therein is a fluid jetting apparatus. The fluid jetting apparatus includes: a nozzle having a jetting hole adapted to jet a fluid; a nozzle opening and closing part adapted to open and close the jetting hole; at least one elastic fluid-storing part adapted to store the fluid therein and connected with the nozzle at a portion thereof in such a way as to jet the fluid by its elasticity through the jetting hole, the elastic fluid-storing part increasing elasticity accumulated by receiving the external force; and a pressurizing part adapted to increase elasticity accumulated in the elastic fluid-storing part by applying the force to the elastic fluid-storing part. The fluid jetting apparatus is applied to various devices, such as a sprayer, an atomizer, an oral cleaner, and so on, for jetting materials of a liquid, gas or gel type to thereby jet the fluid with a strong jetting force in a convenient manipulation.