A tire comprising a lateral groove formed in a tread section and extending in a tire width direction, wherein one groove wall forming the lateral groove includes an inclined surface with curved shape, and the inclined surface has an inclination angle (θ), the inclination angle (θ) being an angle with respect to a tire radial direction from a groove bottom to a tread surface in a cross section perpendicular to a tire axial direction, that gradually increases from an inner side in the tire width direction on a tire equatorial line side to an outer side in the tire width direction, wherein in the cross section perpendicular to the tire axial direction, the one groove wall of the inclined surface from the groove bottom to the tread surface is curved convexly downward, wherein a pair of circumferential main grooves are formed in the tread section, and the tread section includes: a center land region delimited by the pair of circumferential main grooves and comprising a cohesive structure, in which no main groove extending along a circumferential direction is formed; and a shoulder land region located outside in the tire width direction of the center land region delimited by one circumferential main groove of the pair of circumferential main grooves and a tread end, wherein the inclined surface is included in a groove wall of the lateral groove formed in the shoulder land region, wherein in the cohesive structure of the center land region, a circumferential groove having a groove width equal to a groove width of the one circumferential main groove or a groove width wider than the groove width of the one circumferential main groove is not formed in the center land region, wherein only a circumferential narrow groove extending in the tire circumferential direction and having a groove width narrower than the groove width of the circumferential main groove is formed in the center land region. one groove wall forming the lateral groove includes an inclined surface with curved shape, and the inclined surface has an inclination angle (θ), the inclination angle (θ) being an angle with respect to a tire radial direction from a groove bottom to a tread surface in a cross section perpendicular to a tire axial direction, that gradually increases from an inner side in the tire width direction on a tire equatorial line side to an outer side in the tire width direction, wherein in the cross section perpendicular to the tire axial direction, the one groove wall of the inclined surface from the groove bottom to the tread surface is curved convexly downward, wherein a pair of circumferential main grooves are formed in the tread section, and the tread section includes: a center land region delimited by the pair of circumferential main grooves and comprising a cohesive structure, in which no main groove extending along a circumferential direction is formed; and a shoulder land region located outside in the tire width direction of the center land region delimited by one circumferential main groove of the pair of circumferential main grooves and a tread end, a center land region delimited by the pair of circumferential main grooves and comprising a cohesive structure, in which no main groove extending along a circumferential direction is formed; and a shoulder land region located outside in the tire width direction of the center land region delimited by one circumferential main groove of the pair of circumferential main grooves and a tread end, wherein the inclined surface is included in a groove wall of the lateral groove formed in the shoulder land region, wherein in the cohesive structure of the center land region, a circumferential groove having a groove width equal to a groove width of the one circumferential main groove or a groove width wider than the groove width of the one circumferential main groove is not formed in the center land region, wherein only a circumferential narrow groove extending in the tire circumferential direction and having a groove width narrower than the groove width of the circumferential main groove is formed in the center land region.