The present invention aims to provide a molding metal mold capable of increasing the supporting rigidity of an insert. A molding metal mold is provided for forming a cavity between a first metal mold and a second metal mold and for molding a product the cavity, wherein the first metal mold includes: an insert having a part of a cavity surface on one end side; a body member for externally holding the insert; and a plurality of spherical bodies interposed between the insert and the body member and performing alignment of the insert, the plurality of spherical bodies being closely filled between the insert and the body member.