A pneumatic tire has a pair of bead portions, side wall portions and a tread portion. An annular projections group in which plural kinds of projections having different volumes are arranged in a tire circumferential direction is formed on an outer surface of a buttress region of the side wall portion. On the assumption that a first projection is constructed by a projection having the smallest volume, and a second projection is constructed by a projection having the largest volume in the projections included in the annular projections group, a ratio V2/V1 goes beyond 1.00 and is less than 5.00, the ratio V2/V1 being a ratio of a volume V2 of the second projection in relation to a volume V1 of the first projection.