Die casting device capable of preventing bending of horizontal runner during mold opening with simple structure and thus preventing deformation of molding product

This invention provides a die casting device capable of preventing bending of horizontal runner with a simple structure during mold opening and thus preventing deformation of molding product. The die casting device comprises a fixed mold (20) with a plurality of first cavities (21); a movable mold (30) with a plurality second cavities (31); and, a sliding die (40) disposed between the fixed mold (20) and the movable mold (30) and moving in a direction orthogonal to the opening and closing direction of the mold. A horizontal runner groove (32) is formed on the movable mold (30) connecting with the plurality of first and second cavities (21, 31). The sliding die (40) comprises an embedded core (41) capable of moving back and forth with respect to the plurality of first and second cavities (21, 31) and a center sliding core (42) between the fixed mold (20) and the horizontal runner groove (32) during mold clamping and located at the position covering the horizontal runner groove (32). The center sliding core (42