Pneumatic tire

A pneumatic tire comprising, on a tread, a circumferential groove extending in a tire circumferential direction, a plurality of lands defined by the circumferential groove, and a sipe provided in one or more of the lands, wherein

• the sipe extends in a tire axial direction, has both ends open to the circumferential groove, and includes a bottom protrusion projecting beyond a groove bottom of the circumferential groove toward a ground-contact surface,
• the bottom protrusion includes a first crest, a second crest that is provided on each side in the tire axial direction of the first crest and is located on an inner side in a tire radial direction of the first crest, and an arcuate portion provided between the first crest and the second crest, and
• the arcuate portion includes a first arcuate portion that is provided continuously from the first crest and has a cross-sectional arc shape that bulges toward an outer side in the tire radial direction such that a protrusion height from the groove bottom is gradually reduced as a distance from the first crest increases, and a second arcuate portion that is provided continuously from the first arcuate portion and has a cross-sectional arc shape that is recessed toward the inner side in the tire radial direction such that a protrusion height from the groove bottom is gradually reduced as a distance from the first arcuate portion increases.