A pneumatic tire 1 is provided in a tread portion 2 with four main circumferential grooves 3 having a groove width HG of not less than 4 mm, thereby dividing the tread portion into a central land portion 4c, a pair of middle land portions 4m, and a pair of shoulder land portions 4s. Each land portions 4c, 4m, and 4s is made of block rows Bc, Bm, and BS divided by axial grooves 5, and each block 6 has sipes 7. An axial width Wc of the central land portion 4c is 10 to 15% of a tread ground contacting width TW; an axial width Wm of the middle land portion 4m is 15 to 22% of the tread ground contacting width TW; and an axial width Ws of the shoulder land portion 4s is 15 to 22% of the tread ground contacting width TW.The middle land portion 4m is divided into an axially inner part 4mi and an axially outer part 4mo each having a groove width HG of in a range of 2 to 6 mm in the tire circumferential direction.