A tire comprising a tread portion having a ground contact surface, the tread portion comprising a lateral groove (3, 8) extending in a tire axial direction, the lateral groove (3, 8) having a first groove wall and a second groove wall opposing each other, at least one first recess formed by partially recessing the first groove wall, and at least one second recess formed by partially recessing the second groove wall, wherein a depth (d1, d2) of each of the first recess and the second recess from the ground contact surface is less than a groove depth of the lateral groove (3, 8), wherein the first recess comprises, in the ground contact surface, a first opening disposed at the first groove wall, and a first end portion extending substantially parallel to the first opening at a position farthest from the first opening, wherein the second recess comprises, in the ground contact surface, a second opening disposed at the second groove wall, and a second end portion extending substantially parallel to the second opening at a position farthest from the second opening, wherein the first end portion and the second end portion are disposed so as not to oppose each other through the lateral groove (3, 8), wherein the first recess has a first bottom surface that defines an inner side in a tire radial direction, wherein the first bottom surface (5c, 21c) comprises a parallel surface that is substantially parallel to the ground contact surface, characterized in that a groove width of the lateral groove (3, 8, 20) at a portion inward of the first bottom surface in the tire radial direction is greater than a groove width at a depth (d3, d4) position of the first bottom surface. a tread portion having a ground contact surface, the tread portion comprising a lateral groove (3, 8) extending in a tire axial direction, the lateral groove (3, 8) having a first groove wall and a second groove wall opposing each other, at least one first recess formed by partially recessing the first groove wall, and at least one second recess formed by partially recessing the second groove wall, wherein a depth (d1, d2) of each of the first recess and the second recess from the ground contact surface is less than a groove depth of the lateral groove (3, 8), wherein the first recess comprises, in the ground contact surface, a first opening disposed at the first groove wall, and a first end portion extending substantially parallel to the first opening at a position farthest from the first opening, wherein the second recess comprises, in the ground contact surface, a second opening disposed at the second groove wall, and a second end portion extending substantially parallel to the second opening at a position farthest from the second opening, wherein the first end portion and the second end portion are disposed so as not to oppose each other through the lateral groove (3, 8), wherein the first recess has a first bottom surface that defines an inner side in a tire radial direction, wherein the first bottom surface (5c, 21c) comprises a parallel surface that is substantially parallel to the ground contact surface, characterized in that a groove width of the lateral groove (3, 8, 20) at a portion inward of the first bottom surface in the tire radial direction is greater than a groove width at a depth (d3, d4) position of the first bottom surface.