PURPOSE: To decrease the deformation, etc. of grid bodies and to improve the accuracy of plates in a casting mold for multiple-pieces casting of grids, by engraving projecting parts for current collection of the grid bodies in the gate parts provided successively with a charging port thereby forming the grid bodies having strength.

CONSTITUTION: The positions and shapes of a charging port 1 and a solid curtain 2 are the same as those of conventional casting molds except that lugs 8 for current collection of grid bodies are disposed in gates 4'. Casting grooves 3 for grid body of the same shape are arrayed and engraved in the transverse direction of the gates 4' within the possible range of the size of the casting mold in a casting mold for plural-pieces casting and are connected by casting grooves for connecting bones. In case of engraving the grooves 2 in two upper and lower stages, the lugs 8' of the grid body in the lower stage are engraved in the casting mold in the mutually corresponding vertically symmetrical position relations separately from the lugs 8 in the gates 4'.