A pneumatic tire in which adequate performance on snow and icy roads and adequate performance on dry/wet roads are effectively achieved at the same time is provided. Tread section 16 of the pneumatic tire includes center main grooves 20L and 20R extending continuously in the circumferential direction of the tire, and shoulder main grooves 22L and 22R formed at a width direction outer sides of the tire. 2D sipes 23L and 23R are formed in center land portion 24 defined by center main grooves 20L and 20R. 2D sipes 36L and 36R are formed at second block arrays 26L and 26R adjacent to an outer side of the center main grooves 20L and 20R respectively in the width direction of the tire. 3D sipes 42L and 42R are formed at shoulder block arrays 54L and 54R adjacent to an outer side of shoulder main grooves 22L and 22R respectively in the width direction of the tire.