A pneumatic tire comprising: a tread portion extending in a tire circumferential direction and having an annular shape; a pair of sidewall portions disposed on both sides of the tread portion; and a pair of bead portions disposed inward of the sidewall portions in a tire radial direction; the tread portion being provided with a plurality of longitudinal grooves extending in the tire circumferential direction, a plurality of lateral grooves extending in a tire lateral direction, and a plurality of blocks defined by the longitudinal grooves and the lateral grooves, the plurality of blocks comprising: shoulder blocks located on an outermost side in the tire lateral direction, center blocks located closest to a tire equator, and intermediate blocks located between the shoulder block and the center block, shallow grooves having a smaller groove depth than the lateral grooves and the longitudinal grooves being formed in a road contact surface of each of the blocks, the shallow grooves extending in the tire lateral direction, and at least one end thereof communicating with a lateral groove or a longitudinal groove, the shallow grooves including a flat bottom surface and a sipe formed in the bottom surface and extending along the shallow grooves, and among the shallow grooves, center shallow grooves formed in the center block each including a terminating end portion terminating in the center block instead of communicating with a lateral groove or a longitudinal groove, characterized in that the groove area ratio defined as the ratio of the groove area of the longitudinal grooves and the lateral grooves to the entire area of a ground contact region of the tire between ground contact edges is from 50% to 70%, and a contour line of the shallow grooves includes bend points, defined as points where straight lines forming the contour line of the shallow grooves meet each other, including portions where the straight lines are connected together in an arc with a radius of 6 mm or less, the interval between the bend points being greater than the groove depth of the shallow grooves. a tread portion extending in a tire circumferential direction and having an annular shape; a pair of sidewall portions disposed on both sides of the tread portion; and a pair of bead portions disposed inward of the sidewall portions in a tire radial direction; the tread portion being provided with a plurality of longitudinal grooves extending in the tire circumferential direction, a plurality of lateral grooves extending in a tire lateral direction, and a plurality of blocks defined by the longitudinal grooves and the lateral grooves, the plurality of blocks comprising: shoulder blocks located on an outermost side in the tire lateral direction, center blocks located closest to a tire equator, and intermediate blocks located between the shoulder block and the center block, shallow grooves having a smaller groove depth than the lateral grooves and the longitudinal grooves being formed in a road contact surface of each of the blocks, shoulder blocks located on an outermost side in the tire lateral direction, center blocks located closest to a tire equator, and intermediate blocks located between the shoulder block and the center block, shallow grooves having a smaller groove depth than the lateral grooves and the longitudinal grooves being formed in a road contact surface of each of the blocks, the shallow grooves extending in the tire lateral direction, and at least one end thereof communicating with a lateral groove or a longitudinal groove, the shallow grooves including a flat bottom surface and a sipe formed in the bottom surface and extending along the shallow grooves, and among the shallow grooves, center shallow grooves formed in the center block each including a terminating end portion terminating in the center block instead of communicating with a lateral groove or a longitudinal groove, characterized in that the groove area ratio defined as the ratio of the groove area of the longitudinal grooves and the lateral grooves to the entire area of a ground contact region of the tire between ground contact edges is from 50% to 70%, and a contour line of the shallow grooves includes bend points, defined as points where straight lines forming the contour line of the shallow grooves meet each other, including portions where the straight lines are connected together in an arc with a radius of 6 mm or less, the interval between the bend points being greater than the groove depth of the shallow grooves.