To obtain a thin and large-sized casting product by a low pressure casting method using a sand mold and a plaster mold.

This is the equipment in which the surface of a molten light metal 2 stored in a crucible 3 is pressurized to push up the molten light metal 2 into the cavity 16 of a sand mold 11 through a stoke 21. The sand mold 11 is provided with a cavity 16 for casting a thin and large-sized casting product 25, while a plurality of gates 17 are installed in the cavity 16. In addition, the stoke 21 is designed to have, in the intermediate section, a chamber 29 that can supply oxidation preventing gas or combustion preventing gas 28 to the intermediate part.