A blasting method in which an abrasive is ejected together with a compressed gas onto a workpiece through a blast nozzle , wherein a liquid introduction path is provided in the blast nozzle , having one end communicable with a liquid supply source and another end opened in a compressed gas flow path in the blast nozzle , the liquid introduction path being configured to cause a liquid introduced from the liquid supply source to strike with a stream of compressed gas flowing through the blast nozzle , and a flow rate control means is provided between the liquid introduction path and the liquid supply source, wherein the blast nozzle is a suction-type blast nozzle provided with a nozzle tip directed in the ejection direction of a rear nozzle communicated with a compressed gas supply source, and with an abrasive introduction chamber communicated with an abrasive supply source between the rear nozzle and the nozzle tip , the blast nozzle being configured to create a negative pressure in the abrasive introduction chamber by ejection of a stream of compressed gas from the rear nozzle to suck an abrasive in the abrasive supply source, and eject the compressed gas and the abrasive as a mixed fluid, characterised in that the liquid introduction path is formed by a conduit inserted concentrically in the compressed gas flow path provided in the rear nozzle , and the other end of the liquid introduction path is opened at the ejection port of the rear nozzle the method comprising the step of: introducing a liquid into the blast nozzle and atomizing the liquid by causing the liquid to strike with the compressed gas flowing through the blast nozzle , and ejecting droplets of the liquid together with the compressed gas and the abrasive, wherein an amount of the liquid introduced into the blast nozzle being 0.06 cc/min to 150 cc/min and preventing the increase in surface temperature of the workpiece W by evaporating the atomized liquid in the space between the blast nozzle and the workpiece W or on the surface of the workpiece W. a flow rate control means is provided between the liquid introduction path and the liquid supply source, wherein the blast nozzle is a suction-type blast nozzle provided with a nozzle tip directed in the ejection direction of a rear nozzle communicated with a compressed gas supply source, and with an abrasive introduction chamber communicated with an abrasive supply source between the rear nozzle and the nozzle tip , the blast nozzle being configured to create a negative pressure in the abrasive introduction chamber by ejection of a stream of compressed gas from the rear nozzle to suck an abrasive in the abrasive supply source, and eject the compressed gas and the abrasive as a mixed fluid, characterised in that the liquid introduction path is formed by a conduit inserted concentrically in the compressed gas flow path provided in the rear nozzle , and the other end of the liquid introduction path is opened at the ejection port of the rear nozzle the method comprising the step of: introducing a liquid into the blast nozzle and atomizing the liquid by causing the liquid to strike with the compressed gas flowing through the blast nozzle , and ejecting droplets of the liquid together with the compressed gas and the abrasive, wherein an amount of the liquid introduced into the blast nozzle being 0.06 cc/min to 150 cc/min and preventing the increase in surface temperature of the workpiece W by evaporating the atomized liquid in the space between the blast nozzle and the workpiece W or on the surface of the workpiece W. <EOS>