To provide a pneumatic tire easy to remove foreign matters caught in a groove out of the groove.

An irregularity structure 20 is provided in at least one of tread grooves 14A. The irregularity structure 20 includes a pair of groove-side face irregular part 22 and a groove bottom face irregular part 24. The groove side face irregular part 22 is includes a plurality of side face irregular parts 28, and the groove bottom face irregular part 24 includes a pair of a bottom face sideward projection 32 and a bottom face center projection 34. Residual side face projections 28 excluding a pair of the side face projections 28 positioned at the uppermost part and the bottom face sideward projection 32 are inclined so that their tops are near to an opening 1420 further than a base. The nearer are intervals between the tops of the pair of the side face projections 28 and between the tops of the pair of the bottom face sideward projections 32 to the bottom face center projection 34, the smaller sizes or equal sizes are the intervals. The height of the bottom face center projection 34 is formed in a size positioning the top of the bottom face center projection 34 in the neighborhood of a virtual line connected between the tops of the pair of the bottom face sideward projections 32.