To provide a spray nozzle for a liquid, a coating device and a coating method, wherein liquid fine particles equivalent to or better than a spray or centrifugal atomization method are created, wherein a leaf-like nozzle is self-vibrated by use of a compressed gas flow for fine particle generation to coat a coated object at a high coating rate without a rebound, and which allow the generated fine particles to be used as granules for a medicine, food, a chemical or the like.

In this coating method, at least one liquid is discharged from a discharge port of the liquid, a compressed gas is also jetted from a compressed gas outlet formed around the discharge port of the liquid, the liquid discharged from the discharge port of the liquid is atomized to create a particle jet flow, a leaf-like nozzle 30 made of a soft material is connected to an outlet of the particle jet flow, and the particle jet flow jetted from the leaf-like nozzle 30 can intermittently reach a coated object by the pressure of the particle jet flow and the material of the leaf-like nozzle 30. A liquid coating nozzle and a liquid discharge device for the execution of the coating method are configured.