PURPOSE:To make it possible to perform effective spraying, by arranging a ring shaped electrode around the fluid outflow position of a supply pipe for supplying a fluid to be sprayed and applying high voltage to said electrode. CONSTITUTION:A ring shaped electrode 3 is arranged around an outflow pipe 2 and connected to a high voltage DC power source 4. When high voltage is applied to the electrode 3 and water is supplied from a supply pipe 1, water flowed out from the outflow pipe 2 generates a flowing phenomenon by the influence of an electric field and is lowered in surface tension to increase the outflow amount of water while repulsive force between molecules is generated in water droplets by ionization of molecules and water droplets are explosively dispersed to be scattered toward the direction of the ring shaped electrode 3. Mist directed toward the electrode 3 is uniformly mixed with air by a fan 11 and exhausted from an air outflow port 9 to be subjected to humidication of air in a room.