PURPOSE: To improve the quality and yield of castings by allowing the molten metal charged into cavities from a supply part for molten metal in a pressurized atmosphere to solidify under pressure.

CONSTITUTION: A metallic mold 3 which is opened with a sprue 4 in the upper part is supported freely luffably with respect to a base plate. A receiving tray 9 for molten metal where a charging port 8 faces is supported freely oscillatably and pivotally to the upper part of the sprue 4. Further an air chamber 16 having a pressurizing chamber 15 in the upper part of the mold 3 is supported freely openably and closably to a fulcrum shaft 17. After the molten metal is supplied into the tray 9 when said chamber is opened, the chamber 16 is put on the mold 3, and compressed air is supplied into the chamber 15, by which the molten metal stored in the tray 9 is charged into cavities 5. The molten metal in the cavities 5 is solidified under pressure.