A pressure casting device includes: a chamber with an opening portion formed on one side and sealed on the other side; an outer mold having a filling space into which a molten metal is filled, and a casting space connected to the filling space such that the molten metal is supplied from the filling space into the casting space and filled in a shape of a casting; and a self-shielding mold table configured to fix the outer mold and including first and second sealing portions to seal the opening portion of the chamber and an inner side portion facing the opening portion, respectively, and an outer mold support portion contacting the outer mold to support the outer mold; a pneumatic pressure injector provided at one side portion of the chamber to supply pneumatic pressure into the chamber; and a tilting device to rotate the chamber.