A pneumatic tire having a pair of bead portions, a pair of bead cores embedded in the bead portions, respectively, and a carcass including at least one layer of carcass ply extending in a toroidal shape across the pair of bead cores, wherein: in a cross section in the tire width direction of the tire in a state where the tire has been assembled with a prescribed rim but substantially has not been inflated, with no load applied thereon, provided that the maximum height in the tire radial direction of the carcass, measured from the innermost position in the tire radial direction thereof, is h and that positions distanced on the outer side in the tire radial direction from the innermost position in the tire radial direction of the carcass by h, 0.91h, 0.82h, 0.63h, 0.48h, and 0.26h, respectively, are a 7 th height position H7, a 6 th height position H6, a 5 th height position H5, a 4 th height position H4, a 3 rd height position H3, and a 2 nd height position H2, respectively, further provided that a radius of curvature of the carcass within a 7 th height range h7 ranging from the 6 th height position H6 to the 7 th height position H7 is R7, R7 ≥ 0.26h; further provided that an imaginary point on the carcass at the 6 th height position H6 is P6, an imaginary point on the carcass at a tire widthwise position distanced by 0.4h on the inner side in the tire width direction from the outermost position in the tire width direction of the carcass is P 0.4h, a line linking the imaginary points P6 and P 0.4h is L7, and an acute inclination angle formed by the line L7 with respect to the tire width direction is θ7, θ7 ≥ 14°; further provided that the intermediate value of a radius of curvature of the carcass within a 6 th height range h6 ranging from the 5 th height position H5 to the 6 th height position H6 is R6, R6 < R7; further provided that a radius of curvature of the carcass within a 5 th height range h5 ranging from the 4 th height position H4 to the 5 th height position H5 is R5, R5 > R6; further provided that a line linking the innermost and the outermost positions in the tire radial direction, on the carcass, in the 5 th height range h5 is L5 and an acute inclination angle formed by the line L5 with respect to the tire radial direction is θ5, θ5 ≤ 23°; and further provided that a line linking the 2 nd height position H2 and the 3 rd height position H3 on the carcass is L3 and an acute inclination angle formed by the line L3 with respect to the tire radial direction is θ3, θ3 ≤ 27°. in a cross section in the tire width direction of the tire in a state where the tire has been assembled with a prescribed rim but substantially has not been inflated, with no load applied thereon, provided that the maximum height in the tire radial direction of the carcass, measured from the innermost position in the tire radial direction thereof, is h and that positions distanced on the outer side in the tire radial direction from the innermost position in the tire radial direction of the carcass by h, 0.91h, 0.82h, 0.63h, 0.48h, and 0.26h, respectively, are a 7 th height position H7, a 6 th height position H6, a 5 th height position H5, a 4 th height position H4, a 3 rd height position H3, and a 2 nd height position H2, respectively, further provided that a radius of curvature of the carcass within a 7 th height range h7 ranging from the 6 th height position H6 to the 7 th height position H7 is R7, R7 ≥ 0.26h; further provided that an imaginary point on the carcass at the 6 th height position H6 is P6, an imaginary point on the carcass at a tire widthwise position distanced by 0.4h on the inner side in the tire width direction from the outermost position in the tire width direction of the carcass is P 0.4h, a line linking the imaginary points P6 and P 0.4h is L7, and an acute inclination angle formed by the line L7 with respect to the tire width direction is θ7, θ7 ≥ 14°; further provided that the intermediate value of a radius of curvature of the carcass within a 6 th height range h6 ranging from the 5 th height position H5 to the 6 th height position H6 is R6, R6 < R7; further provided that a radius of curvature of the carcass within a 5 th height range h5 ranging from the 4 th height position H4 to the 5 th height position H5 is R5, R5 > R6; further provided that a line linking the innermost and the outermost positions in the tire radial direction, on the carcass, in the 5 th height range h5 is L5 and an acute inclination angle formed by the line L5 with respect to the tire radial direction is θ5, θ5 ≤ 23°; and further provided that a line linking the 2 nd height position H2 and the 3 rd height position H3 on the carcass is L3 and an acute inclination angle formed by the line L3 with respect to the tire radial direction is θ3, θ3 ≤ 27°.