To produce a tire mold not requiring the movement of a blade by manufal work and capable of corresponding to the movement of the blade more rapidly and accurately than before.

A master wherein the circumferential design within a mold segment is formed to become intensionally smaller than a fundamental design is used to ensure the wall thickness of the mold main body of the blade roots of both end surface parts of the mold segment. After a dummy blade having the wall thickness corresponding to the moving quantity of a blade is superposed on the blade to be embedded in a casting mold, the dummy blade is pulled out to form the groove of the blade and this groove is filled with a casting material to form a casting mold performing the accurate movement of the blade.