A pneumatic tire comprising: five or more circumferential main grooves (21, 22, 23) extending in a tire circumferential direction; and a plurality of land portions (31, 32) defined by the circumferential main grooves (21, 22, 23), the plurality of land portions comprising blocks (31B, 32B) separated from one another by lug grooves and arranged side by side in the tire circumferential direction; a ratio of a tire lateral direction length of an arrangement range of the blocks (31B, 32B) to a developed tread width being not less than 0.55 and not more than 0.70; a ratio of a groove width (W1, W2) of the circumferential main grooves (21, 22), other than outermost circumferential main grooves adjacent to tire lateral direction outermost land portions of the plurality of land portions, to the developed tread width being not less than 0.007 and not more than 0.024 and to a groove width of the outermost circumferential main grooves being not less than 0.15 and not more than 0.45; a ratio of a groove width of the outermost circumferential main grooves to the developed tread width being not less than 0.025 and not more than 0.055; a ratio of a groove width of each of the lug grooves to the developed tread width being not less than 0.003 and not more than 0.016; and for a set of the land portions opposite each other across the tire equatorial plane, a range (C1, C2) taken up in the tire circumferential direction by each of the lug grooves in one of the land portions being included in a range (D1, D2) taken up in the tire circumferential direction by the corresponding block in the other land portion, wherein for sets of the land portions (31, 32) opposite each other across a tire equatorial plane, in each of the sets of the land portions (31, 32), positions of blocks (31B, 32B) adjacent in the tire lateral direction are the same in the tire circumferential direction, the pneumatic tire further comprising shoulder lug grooves (25A, 25B) formed in each of the shoulder land portions and extending in the tire lateral direction, characterized in that a ratio of a groove depth (DLo) of each of the shoulder lug grooves (25A, 25B) to a groove depth of each of the circumferential main grooves is not less than 0.03 and not more than 0.5, and the shoulder lug grooves (25A, 25B) include first shoulder lug grooves and second shoulder lug grooves having different groove widths, and the first shoulder lug grooves and the second shoulder lug grooves are disposed in the shoulder land portions alternately in the tire circumferential direction. five or more circumferential main grooves (21, 22, 23) extending in a tire circumferential direction; and a plurality of land portions (31, 32) defined by the circumferential main grooves (21, 22, 23), the plurality of land portions comprising blocks (31B, 32B) separated from one another by lug grooves and arranged side by side in the tire circumferential direction; a ratio of a tire lateral direction length of an arrangement range of the blocks (31B, 32B) to a developed tread width being not less than 0.55 and not more than 0.70; a ratio of a groove width (W1, W2) of the circumferential main grooves (21, 22), other than outermost circumferential main grooves adjacent to tire lateral direction outermost land portions of the plurality of land portions, to the developed tread width being not less than 0.007 and not more than 0.024 and to a groove width of the outermost circumferential main grooves being not less than 0.15 and not more than 0.45; a ratio of a groove width of the outermost circumferential main grooves to the developed tread width being not less than 0.025 and not more than 0.055; a ratio of a groove width of each of the lug grooves to the developed tread width being not less than 0.003 and not more than 0.016; and for a set of the land portions opposite each other across the tire equatorial plane, a range (C1, C2) taken up in the tire circumferential direction by each of the lug grooves in one of the land portions being included in a range (D1, D2) taken up in the tire circumferential direction by the corresponding block in the other land portion, wherein for sets of the land portions (31, 32) opposite each other across a tire equatorial plane, in each of the sets of the land portions (31, 32), positions of blocks (31B, 32B) adjacent in the tire lateral direction are the same in the tire circumferential direction, the pneumatic tire further comprising shoulder lug grooves (25A, 25B) formed in each of the shoulder land portions and extending in the tire lateral direction, characterized in that a ratio of a groove depth (DLo) of each of the shoulder lug grooves (25A, 25B) to a groove depth of each of the circumferential main grooves is not less than 0.03 and not more than 0.5, and the shoulder lug grooves (25A, 25B) include first shoulder lug grooves and second shoulder lug grooves having different groove widths, and the first shoulder lug grooves and the second shoulder lug grooves are disposed in the shoulder land portions alternately in the tire circumferential direction.