PNEUMATIC TIRE

In addition to dramatic improvement of on-ice performance, to balance with other performances. A pneumatic tire comprises, in a tread portion 1, at least two block groups G B1 to G B3 whose block number density is within a range of 0.003 pieces/mm 2 to 0.04 pieces/mm 2 . At least one block group G B2 includes block 4 in which lateral length BW 2 is larger that its longitudinal length BL 2 .