A pneumatic tire, comprising a belt comprising at least one belt layer (15a, 15b) on a tire radial-direction inner side of a tread portion, wherein the belt comprises a belt layer (15a, 15b) in which a reinforcing element comprising plural metal filaments aligned in a single row without being twisted together is embedded in an elastomer, the tread portion comprises: two or more circumferential main grooves (16a-16c) arranged within a width of a ground-contact surface; and land portions (17a-17d) partitioned by the circumferential main grooves (16a-16c), when two land portions (17c, 17d) on respective tread width-direction outer sides are defined as shoulder land portions (17c, 17d) while land portions (17a, 17b) on a tread width-direction inner side than the shoulder land portions (17c, 17d) are defined as center land portions (17a, 17b), a widthwise sipe (18a, 18b) extending in the tread width direction is arranged in at least one of the center land portions (17a, 17b), characterised in that the widthwise sipe (18a, 18b) comprises: a linear portion (18aa, 18ba) linearly extending from the surface of the tread portion toward the tire radial-direction inner side; and a bent portion (18ab, 18bb) extending from a tire radial-direction inner end of the linear portion (18aa, 18ba) toward the tire radial-direction inner side while bending in a tire circumferential direction, a linear shortest section where the length of the linear portion (18aa, 18ba) is the shortest exists in an extending length center portion of the widthwise sipe (18a, 18b), and the length of the linear portion (18aa, 18ba) increases from the linear shortest section toward at least one of tread widthwise end portions. the belt comprises a belt layer (15a, 15b) in which a reinforcing element comprising plural metal filaments aligned in a single row without being twisted together is embedded in an elastomer, the tread portion comprises: two or more circumferential main grooves (16a-16c) arranged within a width of a ground-contact surface; and land portions (17a-17d) partitioned by the circumferential main grooves (16a-16c), when two land portions (17c, 17d) on respective tread width-direction outer sides are defined as shoulder land portions (17c, 17d) while land portions (17a, 17b) on a tread width-direction inner side than the shoulder land portions (17c, 17d) are defined as center land portions (17a, 17b), a widthwise sipe (18a, 18b) extending in the tread width direction is arranged in at least one of the center land portions (17a, 17b), characterised in that the widthwise sipe (18a, 18b) comprises: a linear portion (18aa, 18ba) linearly extending from the surface of the tread portion toward the tire radial-direction inner side; and a bent portion (18ab, 18bb) extending from a tire radial-direction inner end of the linear portion (18aa, 18ba) toward the tire radial-direction inner side while bending in a tire circumferential direction, a linear shortest section where the length of the linear portion (18aa, 18ba) is the shortest exists in an extending length center portion of the widthwise sipe (18a, 18b), and the length of the linear portion (18aa, 18ba) increases from the linear shortest section toward at least one of tread widthwise end portions.