Pneumatic tire

A pneumatic tire comprising, on a tread surface, a plurality of circumferential main grooves extending in a tread circumferential direction, and a plurality of land portions defined between circumferential main grooves adjacent in a tread width direction among the plurality of circumferential main grooves or by the circumferential main grooves and tread edges, wherein

• the land portions include a plurality of widthwise sipes extending in the tread width direction,
• each widthwise sipe includes a tread surface side sipe portion extending from the tread surface inward in a tire radial direction, a first branched sipe portion branching and extending from the tread surface side sipe portion inward in the tire radial direction, and second branched sipe portions branching and extending from respective tire radial inner ends of the first branched sipe portion inward in the tire radial direction,
• in a tire circumferential cross-sectional view in a reference state such that the pneumatic tire is mounted on an applicable rim, filled to a prescribed internal pressure, and under no load,
• the tread surface side sipe portion extends in a normal direction of the tread surface,
• the first branched sipe portion includes a first horizontal sipe portion extending along a tire circumferential direction and two first vertical sipe portions extending in the normal direction of the tread surface, and
• each second branched sipe portion includes a second horizontal sipe portion extending along the tire circumferential direction and two second vertical sipe portions extending in the normal direction of the tread surface, and
• sipe widths of the tread surface side sipe portion, the first branched sipe portion, and the second branched sipe portions are equivalent.