A tire comprises a tread portion 2 comprising at least a first main groove 3 and a second main groove 4 extending continuously in a tire circumferential direction. The first main groove 3 comprises a first oblique portion 11 inclined with respect to the tire circumferential direction and a second oblique portion 12 connected with the first oblique portion and inclined in an opposite direction to the first oblique portion 11. The second main groove 4 comprises a third oblique portion 13 inclined in a same direction as the first oblique portion 11 with respect to the tire circumferential direction, a fourth oblique portion 14 inclined in an opposite direction to the third oblique portion 13, and a longitudinal groove portion 15 disposed between the third and fourth oblique portions 13 and 14 so that they are not directly connected and extending along the tire circumferential direction.