A pneumatic tire that is structured from: a carcass layer that extends in a toroidal shape, both end portions of the carcass layer in a transverse direction being folded-over onto a pair of bead cores, and the carcass layer being structured from two or more carcass plies (18, 19) in which are embedded a plurality of carcass cords (20, 21) that are formed from organic fibers and are inclined with respect to a tire equator S; a belt layer that is disposed at a radial direction outer side of the carcass layer; a tread that is disposed at a radial direction outer side of the belt layer; and a reinforcing layer that is disposed between adjacent carcass plies (18, 19) at a position that overlaps the belt layer in a radial direction, the reinforcing layer being structured from at least one reinforcing ply in which are embedded a plurality of reinforcing cords that are formed from steel and that are inclined with respect to the tire equator S, characterised in that an inclination angle A of the reinforcing cords with respect to the tire equator S is within a range of 40 to 90°, wherein a compressive rigidity F per 50 mm width of the reinforcing layer, in a direction parallel to the reinforcing cords, is within a range of 1000 to 2400 N, the compressive rigidity F being the compressive rigidity of one reinforcing cord multiplied by the number of reinforcing cords per 50 mm width of the reinforcing layer, wherein the number of reinforcing cords per 50 mm width of the reinforcing layer is 40 to 80, wherein the reinforcing cords are structured by twisting a plurality of filaments, and wherein the reinforcing cords have a bending rigidity D within a range of 230 to 300 N●m 2, D being represented by the formula: D = 2 ⁢ Ncos ⁢ α 1 + cos 2 α EI + sin 2 α GIp and G being represented by the formula: G = E 2 1 + μf with N being a number of filaments that structure the reinforcing cord, α being a twisting angle of the filaments, E being a modulus of longitudinal elasticity of the filaments, G being a modulus of transverse elasticity of the filaments, I being a sectional secondary moment, Ip being a sectional secondary polar moment, d being a diameter of the filaments, and μf being a Poisson's ratio of the filaments. a carcass layer that extends in a toroidal shape, both end portions of the carcass layer in a transverse direction being folded-over onto a pair of bead cores, and the carcass layer being structured from two or more carcass plies (18, 19) in which are embedded a plurality of carcass cords (20, 21) that are formed from organic fibers and are inclined with respect to a tire equator S; a belt layer that is disposed at a radial direction outer side of the carcass layer; a tread that is disposed at a radial direction outer side of the belt layer; and a reinforcing layer that is disposed between adjacent carcass plies (18, 19) at a position that overlaps the belt layer in a radial direction, the reinforcing layer being structured from at least one reinforcing ply in which are embedded a plurality of reinforcing cords that are formed from steel and that are inclined with respect to the tire equator S, characterised in that an inclination angle A of the reinforcing cords with respect to the tire equator S is within a range of 40 to 90°, wherein a compressive rigidity F per 50 mm width of the reinforcing layer, in a direction parallel to the reinforcing cords, is within a range of 1000 to 2400 N, the compressive rigidity F being the compressive rigidity of one reinforcing cord multiplied by the number of reinforcing cords per 50 mm width of the reinforcing layer, wherein the number of reinforcing cords per 50 mm width of the reinforcing layer is 40 to 80, wherein the reinforcing cords are structured by twisting a plurality of filaments, and wherein the reinforcing cords have a bending rigidity D within a range of 230 to 300 N●m 2, D being represented by the formula: D = 2 ⁢ Ncos ⁢ α 1 + cos 2 α EI + sin 2 α GIp and G being represented by the formula: G = E 2 1 + μf with N being a number of filaments that structure the reinforcing cord, α being a twisting angle of the filaments, E being a modulus of longitudinal elasticity of the filaments, G being a modulus of transverse elasticity of the filaments, I being a sectional secondary moment, Ip being a sectional secondary polar moment, d being a diameter of the filaments, and μf being a Poisson's ratio of the filaments.