A spraying apparatus comprising: a liquid storage tank that stores a liquid; a mist nozzle that spouts fine mist; a gas supplier that supplies a pressurized gas to the mist nozzle; and a liquid supplier that supplies a pressurized liquid to the mist nozzle, the pressurized liquid being obtained from the liquid stored in the liquid storage tank, wherein the mist nozzle includes a mist nozzle main body that has a liquid passageway through which the pressurized liquid is supplied from the liquid supplier and a gas passageway through which a pressurized gas is supplied from the gas supplier, an inner lid that is disposed at a tip of the mist nozzle main body, covers an opening of the liquid passageway, and has a flat inner end portion, an outer lid that is disposed at the tip of the mist nozzle main body, covers the inner lid, covers an opening of the gas passageway, and has a flat outer end portion facing the inner end portion of the inner lid, a gas-liquid mixing section that is disposed between the inner lid and the outer lid, is formed at a space of a disc-shaped profile between the inner end portion of the inner lid and the outer end portion of the outer lid, and mixes a gas flow flowing through the gas passageway and a liquid flow flowing through the liquid passageway, a liquid inlet that is provided so as to penetrate at least one portion of the inner end portion of the inner lid in an axial direction, communicates with the gas-liquid mixing section, and allows a liquid flow flowing through the liquid passageway to enter the gas-liquid mixing section, a gas inlet that is disposed on a side portion of the gas-liquid mixing section between the inner lid and the outer lid so as to communicate with the gas-liquid mixing section, and allows the gas flow flowing through the gas passageway to enter the gas-liquid mixing section toward the liquid flow entering the gas-liquid mixing section from the liquid inlet, and a spout that is provided so as to penetrate the outer end portion of the outer lid, communicates with the gas-liquid mixing section, and spouts as the fine mist a liquid atomized by mixing the gas flow and the liquid flow in the gas-liquid mixing section, and wherein the gas inlet is disposed in a vicinity of the liquid inlet and is disposed so that an entering direction of the gas flow entering from the gas inlet intersects with an entering direction of the liquid from entering from the liquid inlet. a liquid storage tank that stores a liquid; a mist nozzle that spouts fine mist; a gas supplier that supplies a pressurized gas to the mist nozzle; and a liquid supplier that supplies a pressurized liquid to the mist nozzle, the pressurized liquid being obtained from the liquid stored in the liquid storage tank, wherein the mist nozzle includes a mist nozzle main body that has a liquid passageway through which the pressurized liquid is supplied from the liquid supplier and a gas passageway through which a pressurized gas is supplied from the gas supplier, an inner lid that is disposed at a tip of the mist nozzle main body, covers an opening of the liquid passageway, and has a flat inner end portion, an outer lid that is disposed at the tip of the mist nozzle main body, covers the inner lid, covers an opening of the gas passageway, and has a flat outer end portion facing the inner end portion of the inner lid, a gas-liquid mixing section that is disposed between the inner lid and the outer lid, is formed at a space of a disc-shaped profile between the inner end portion of the inner lid and the outer end portion of the outer lid, and mixes a gas flow flowing through the gas passageway and a liquid flow flowing through the liquid passageway, a liquid inlet that is provided so as to penetrate at least one portion of the inner end portion of the inner lid in an axial direction, communicates with the gas-liquid mixing section, and allows a liquid flow flowing through the liquid passageway to enter the gas-liquid mixing section, a gas inlet that is disposed on a side portion of the gas-liquid mixing section between the inner lid and the outer lid so as to communicate with the gas-liquid mixing section, and allows the gas flow flowing through the gas passageway to enter the gas-liquid mixing section toward the liquid flow entering the gas-liquid mixing section from the liquid inlet, and a spout that is provided so as to penetrate the outer end portion of the outer lid, communicates with the gas-liquid mixing section, and spouts as the fine mist a liquid atomized by mixing the gas flow and the liquid flow in the gas-liquid mixing section, and wherein the gas inlet is disposed in a vicinity of the liquid inlet and is disposed so that an entering direction of the gas flow entering from the gas inlet intersects with an entering direction of the liquid from entering from the liquid inlet.