Abstract: A metal mold of improved durability and enhanced ventilation efficiency during vulcanization of a tire, including a plug for a vent hole of the mold and a tire manufactured by using the metal mold. The metal mold is one in which vent holes pass through toward an outer portion of the mold from an inner surface of the mold, and in which a plug body is detachably fitted into each of the vent holes. The plug body is configured by a cylinder and a valve. The cylinder includes a large-diameter head portion at an upper portion of the cylinder, and a tubular cylindrical portion with a ventilation hole formed in the center of the cylinder. The valve is inserted into the ventilation hole of the cylinder with an interstice having a predetermined size interposed therebetween. Through-holes communicating with the interstice are formed on the side surface of the cylinder.

Abstract: Provided are the following: which enhances ventilation efficiency during vulcanization of the tire and also enhances the durability of the metal mold; a plug to be used in a vent hole of the metal mold for tire formation; and a tire manufactured by using the metal mold for tire formation. The metal mold for tire formation of the present invention is one in which vent holes (2) pass through toward an outer portion (1b) of the metal mold from an inner surface (1a) of a metal mold (1), and in which a plug body (3) is detachably fitted into each of the vent holes (2). The plug body (3) is configured by a cylinder (4) and a valve (5). The cylinder (4) includes a large-diameter head portion 4a at an upper portion the cylinder (4), a tubular cylindrical portion 4c with a ventilation hole (4b) formed in the center of the cylinder (4). The valve (5) is inserted into the ventilation hole 4b of the cylinder (4) with an interstice (7) having a predetermined size t interposed therebetween.