To provide an inexpensive sand blasting device capable of stably circulating/feeding an abrasive.
An abrasive suction member 6 having a connection port 18 to a suction hose 5, an abrasive suction port 19 and an air suction port 20a in which a first passage 21a for communicating the air suction port 20a with the connection port 18 and a second passage 21b for communicating the abrasive suction port 19 with the first passage 21a are formed is buried in a layer of the abrasive stored at a bottom part 4 of a processing chamber. The air suction port 20a is exposed from an upper surface of the layer A of the abrasive and is detachably fixed to the bottom part 4 by a magnet 17. The abrasive stored at the bottom part 4 is circulated and fed from the abrasive suction member 6 to a nozzle gun through the suction hose 5. Thereby, a suction route of the abrasive to the nozzle gun is freely shortened and the abrasive can be stably circulated and fed to the nozzle gun by small suction force.
Higashio Masahiro
Torii Kazuhisa