A pneumatic tire comprises a tread portion provided with blocks each provided with a first variable depth sipe and a second variable depth sipe each having both axial ends opened at edges of the block on both sides thereof in the tire axial direction. In each block, a shallow portion of the first variable depth sipe overlaps, in the tire axial direction, with a deep main portion of the second variable depth sipe. an axial groove dividing the blocks is provided with a tie bar overlapping, in the tire axial direction, with the deep main portion of the adjacent variable depth sipe.