A tire mold which is constituted by arranging a pair of upper and lower side plates (11, 12), a sector, a sector shoe holding the sector and an actuator, in sequence from an inner side to an outer side to a radial direction of the tire, wherein a brim-like ring (20, 21) is provided on each outer diameter portion (11a, 12a) of said side plates (11, 12) of upper and lower pairs, and aluminum alloy or aluminum is selected as the material for the sector, and iron is selected as the material for side plates (11, 12) the brim-like rings (20, 21) and the sector shoe, and wherein the form of said brim-like ring (20, 21) is such that, when the mold is in fully closed state at room temperature, projection parts (16b, 16c) formed in upper and lower sides of said sector shoe contact the outer diameter portion (20a, 21a) of said brim-like ring (20, 21), thus resulting in determination of the positions of said sector shoe and said sector against the upper and lower pairs of said side plates (11, 12), and inner diameters A of the projection parts (14a, 14b) of the sector, outer diameters B of the one pair of upper and lower side plates (11, 12), inner diameters C of the projection parts (16b, 16c) of the sector shoe and an outer diameter D of the brim-like rings (20, 21) satisfy the formula: -0.5 mm < (C-D) - (A-B) < 0 mm, and when the mold has reached a vulcanization temperature in fully closed state, the inner diameter portion (14a, 14b) of said sector contacts the outer diameter portion (11a, 12a) of said side plate (11, 12), and the projection parts (16b, 16c) formed in upper and lower sides of said sector shoe are formed to contact the outer diameter portions (20a, 21a) of said brim-like rings (20, 21). wherein a brim-like ring (20, 21) is provided on each outer diameter portion (11a, 12a) of said side plates (11, 12) of upper and lower pairs, and aluminum alloy or aluminum is selected as the material for the sector, and iron is selected as the material for side plates (11, 12) the brim-like rings (20, 21) and the sector shoe, and wherein the form of said brim-like ring (20, 21) is such that, when the mold is in fully closed state at room temperature, projection parts (16b, 16c) formed in upper and lower sides of said sector shoe contact the outer diameter portion (20a, 21a) of said brim-like ring (20, 21), thus resulting in determination of the positions of said sector shoe and said sector against the upper and lower pairs of said side plates (11, 12), and inner diameters A of the projection parts (14a, 14b) of the sector, outer diameters B of the one pair of upper and lower side plates (11, 12), inner diameters C of the projection parts (16b, 16c) of the sector shoe and an outer diameter D of the brim-like rings (20, 21) satisfy the formula: -0.5 mm < (C-D) - (A-B) < 0 mm, and when the mold has reached a vulcanization temperature in fully closed state, the inner diameter portion (14a, 14b) of said sector contacts the outer diameter portion (11a, 12a) of said side plate (11, 12), and the projection parts (16b, 16c) formed in upper and lower sides of said sector shoe are formed to contact the outer diameter portions (20a, 21a) of said brim-like rings (20, 21).