PURPOSE: To prevent casting defects by arranging main ingate parts and auxiliary ingate parts at the upper parts and necessary positions of cavity parts, respectively and further, connecting the main ingate parts and auxiliary ingate parts with a sprue through a runner and an auxiliary runner, respectively.

CONSTITUTION: The sideways runner 13 is formed at horizontal direction from lower part of the sprue 12, and also the auxiliary runner 17 is arrange at a horizontal direction from a vertical runner 16 arranged at lower part of the sprue 12. Further, the main ingate parts 14 are arranged at every regular intervals at lower part of the sideways runner 13 and connected with the cavity parts 15, and necessary number of the auxiliary ingate parts 14a are arranged at the auxiliary runner 17 and connected with required positions of the cavity parts 15. In this way, as molten metal is supplied at every nooks and corners of inside of the cavities 15, the generation of the casting defects, such as casting cavity, etc., is prevented.