On a tread portion, a plurality of blocks defined by a plurality of main grooves and a plurality of transverse grooves. The main grooves annularly and continuously extend in a tire circumferential direction. The transverse grooves extend in a tire width direction so as to intersect the main grooves. The plurality of blocks include a center block located at a center in the tire width direction and having, on a surface thereof, a first groove with closed both ends and a second groove joining the first groove.