A spraying apparatus comprising: a spraying apparatus main body that has a liquid flow passage and a gas flow passage; a liquid introduction portion that is provided at an end portion of the liquid flow passage; an annular gas introduction portion that is provided at an end portion of the gas flow passage; a gas-liquid spout portion that covers the liquid introduction portion and the annular gas introduction portion; a liquid inlet that is provided for communicating with the liquid flow passage at at least one place of the liquid introduction portion and allows a liquid flow to enter a gas-liquid mixer which is a space inside the annular gas introduction portion; a gas inlet that is provided for communicating with the gas flow passage at at least one place of the annular gas introduction portion and allows a gas flow to enter the gas-liquid mixer; a tubular flow passage, which penetrates the gas-liquid spout portion, mixing the gas flow exited from the gas inlet and the liquid flow exited from the liquid inlet, and allowing a gas-liquid mixed fluid in which a liquid is atomized to exit; a spout that is provided in the gas-liquid spout portion for communicating with the tubular flow passage and spouts the gas-liquid mixed fluid; a flow passage that is provided in the gas-liquid spout portion and has a taper communicating with the spout; a straightener that has an opening having an uneven shape provided in the flow passage having the taper; and a projection portion that is provided in the liquid introduction portion, protrudes to the gas-liquid mixer, and forms the straightener and a straightening outlet. a spraying apparatus main body that has a liquid flow passage and a gas flow passage; a liquid introduction portion that is provided at an end portion of the liquid flow passage; an annular gas introduction portion that is provided at an end portion of the gas flow passage; a gas-liquid spout portion that covers the liquid introduction portion and the annular gas introduction portion; a liquid inlet that is provided for communicating with the liquid flow passage at at least one place of the liquid introduction portion and allows a liquid flow to enter a gas-liquid mixer which is a space inside the annular gas introduction portion; a gas inlet that is provided for communicating with the gas flow passage at at least one place of the annular gas introduction portion and allows a gas flow to enter the gas-liquid mixer; a tubular flow passage, which penetrates the gas-liquid spout portion, mixing the gas flow exited from the gas inlet and the liquid flow exited from the liquid inlet, and allowing a gas-liquid mixed fluid in which a liquid is atomized to exit; a spout that is provided in the gas-liquid spout portion for communicating with the tubular flow passage and spouts the gas-liquid mixed fluid; a flow passage that is provided in the gas-liquid spout portion and has a taper communicating with the spout; a straightener that has an opening having an uneven shape provided in the flow passage having the taper; and a projection portion that is provided in the liquid introduction portion, protrudes to the gas-liquid mixer, and forms the straightener and a straightening outlet.