The present invention relates to a low-pressure fog used for spraying fine water particles such as fog in a plastic house or a house, and can be disassembled and assembled without a separate tool, So that the fluid can be easily cleaned. Further, when the fluid passes through the fluid guide member from the fog body, the foreign matters are filtered in multiple stages to minimize clogging of the flow channel, The flow path of the nozzle is formed to be equal to or smaller than that of the nozzle hole to minimize clogging of the nozzle hole, thereby increasing the number of spraying without nozzle clogging and maintaining the fog ability at a low pressure (2 to 3 kg / cm 2) To provide a low-pressure fog. That is, according to the present invention, a threaded portion is formed on an upper side of a boundary plate on which a hose coupling pipe is integrally formed downward, a fluid guide member seat plate is formed so as to have a ring groove to which an O- A fog body formed with a water supply hole penetrating to the center of the guide member seat plate； A guide pipe fitted to the water supply hole is formed at a lower side of the guide vane positioned above the fluid guide member, and the guide protrusion is inserted into the nozzle body upward to closely contact the vortex flow channel, A fluid guide member having a fluid passage； A protruded arcuate coupling protrusion opposed to each other at a reduced diameter is formed on the upper side of the fitting hole formed to be opened downward so as to fit the guide member of the fluid guide member and the fluid guide member formed in the fog body, A nozzle body formed with a vortex flow path upwardly and having a nozzle hole connected to the vortex flow path at a center thereof； A pressing ring which is engaged with the engaging jaw formed at the outer lower end of the nozzle body, and a tightening nut in which a screw groove to be fastened to the screw portion formed in the fog body is formed.본 발명은 비닐하우스나 축사 등에 적용하여
