A tire vulcanizing mold manufacturing method for manufacturing of a mold including a vent mechanism, and a tire vulcanizing mold manufactured using such method are disclosed. Blades each with anchor portions are mounted on a plaster mold with only the anchor portions embedded in the plaster mold. A portion of each blade mounted on the plaster mold is covered with a cover layer made of a destructible fire-resistant material. Molten metal is poured over a surface of the plaster mold to cast a mold to which the shape of the surface is transferred and in which each blade is buried. The anchor portions protruding from the surface of the mold are removed, and the cover layer is removed to form a slit around the blade. A vent opening forming member is removed to form a vent opening. The slit and the vent opening communicate with each other.