Casting mold

A casting mold comprising:

• a first mold;
• and
• a second mold configured to relatively move toward and away from the first mold and form a cavity portion configured to manufacture a cast product, between the second mold and the first mold,
• wherein the second mold includes a second mold body and a core protruding from the second mold body in a first direction that is directed toward the first mold, the core being configured to form a hollow portion in the cast product,
• the core is provided with a groove portion that opens in the first direction and that is recessed in a second direction opposite to the first direction, and
• the second mold is provided with an air supply flow path configured to supply air for blowing, to a bottom of the groove portion, wherein the core includes a first core and a second core that covers at least a part of an outer peripheral surface of the first core to form the groove portion between the first core and the second core, the second mold body includes a core through-hole through which the first core is inserted, and the air supply flow path includes an air introduction path formed between an inner peripheral surface of the core through-hole and the outer peripheral surface of the first core and communicating with the bottom of the groove portion, and wherein the second mold includes a bolt configured to fix the first core to the second mold body, the second mold includes a recessed portion in which a head portion of the bolt is accommodated, and a space between an outer peripheral surface of the head portion of the bolt and an inner peripheral surface of the recessed portion forms a part of the air supply flow path.