At least one of land portion sections 14, 15, 16 that are formed in a tread surface portion 10a is constituted by a first land portion 17 and a second land portion 18 being alternately and consecutively arranged along the tire circumference direction R, and a first top surface portion 17a and a first inclined surface portion 17b whose recess amount inward in a radial direction of the tire gradually increases in accordance with heading from the first top surface portion 17a toward the outer side in a width direction of the tire H are provided in a first land portion 17, and a second top surface portion 18a and a second inclined surface portion 18b whose recess amount inward in the radial direction of the tire gradually increases in accordance with heading from the second top surface portion 18a toward the inner side in the width direction of the tire H are provided in a second land portion 18, and by the first inclined surface portion 17b and the second inclined surface portion 18b mutually overlapping in the circumferential direction of the tire R, a V-shaped groove that has the first inclined surface portion 17b and the second inclined surface portion 18b as portions of side walls is formed. According to the present invention, it is possible to prevent a decline in steering stability and to improve drainage performance.