A pneumatic tire comprising a plurality of sipes on a tread surface, wherein: the plurality of sipes include a large intermediate width sipe having: a pair of intermediate sipe wall surface portions being located on an intermediate portion of the sipe in a tire radial direction, and facing each other at a constant spacing t1; a pair of bottom-side sipe wall surface portions being adjacent to the intermediate sipe wall surface portions on a sipe bottom side of the sipe, and facing each other at a constant spacing t2 smaller than the spacing t1 between the pair of intermediate sipe wall surface portions; and a pair of tread-surface-side sipe wall surface portions being adjacent to the intermediate sipe wall surface portions on the tread surface side, and facing each other at a constant spacing t3 smaller than the spacing t1 between the pair of intermediate sipe wall surface portions; characterised in that: within a central region of the tread surface, a spacing along a tire circumferential direction between the large intermediate width sipe and another sipe or groove adjacent to the large intermediate width sipe in the tire circumferential direction is 2.0 to 4.0 times of a sipe depth D of the large intermediate width sipe, wherein the large intermediate width sipe is configured such that: a length b of the pair of intermediate sipe wall surface portions along the tire radial direction is 0.1 to 0.3 times of the sipe depth D of the large intermediate width sipe; and a central position of the pair of intermediate sipe wall surface portions in the tire radial direction matches a central position of the large intermediate width sipe in the tire radial direction. the plurality of sipes include a large intermediate width sipe having: a pair of intermediate sipe wall surface portions being located on an intermediate portion of the sipe in a tire radial direction, and facing each other at a constant spacing t1; a pair of bottom-side sipe wall surface portions being adjacent to the intermediate sipe wall surface portions on a sipe bottom side of the sipe, and facing each other at a constant spacing t2 smaller than the spacing t1 between the pair of intermediate sipe wall surface portions; and a pair of tread-surface-side sipe wall surface portions being adjacent to the intermediate sipe wall surface portions on the tread surface side, and facing each other at a constant spacing t3 smaller than the spacing t1 between the pair of intermediate sipe wall surface portions; characterised in that: a pair of intermediate sipe wall surface portions being located on an intermediate portion of the sipe in a tire radial direction, and facing each other at a constant spacing t1; a pair of bottom-side sipe wall surface portions being adjacent to the intermediate sipe wall surface portions on a sipe bottom side of the sipe, and facing each other at a constant spacing t2 smaller than the spacing t1 between the pair of intermediate sipe wall surface portions; and a pair of tread-surface-side sipe wall surface portions being adjacent to the intermediate sipe wall surface portions on the tread surface side, and facing each other at a constant spacing t3 smaller than the spacing t1 between the pair of intermediate sipe wall surface portions; characterised in that: within a central region of the tread surface, a spacing along a tire circumferential direction between the large intermediate width sipe and another sipe or groove adjacent to the large intermediate width sipe in the tire circumferential direction is 2.0 to 4.0 times of a sipe depth D of the large intermediate width sipe, wherein the large intermediate width sipe is configured such that: a length b of the pair of intermediate sipe wall surface portions along the tire radial direction is 0.1 to 0.3 times of the sipe depth D of the large intermediate width sipe; and a central position of the pair of intermediate sipe wall surface portions in the tire radial direction matches a central position of the large intermediate width sipe in the tire radial direction. a length b of the pair of intermediate sipe wall surface portions along the tire radial direction is 0.1 to 0.3 times of the sipe depth D of the large intermediate width sipe; and a central position of the pair of intermediate sipe wall surface portions in the tire radial direction matches a central position of the large intermediate width sipe in the tire radial direction.