Each central land portion row (9) has at least one first narrow groove (21) that is open to the central main groove (5) and has a length a in a tire width direction and an angle α to the tire width direction, and at least one second narrow groove (23) has a length b in the tire width direction and an angle β to the tire width direction. Each outer land portion row (11) located on an outer side of a different one of the outer main grooves (7) in the tire width direction has at least one third narrow groove (25) that is open to the outer main groove (7) and has a length c in the tire width direction and an angle γ to the tire width direction. In the tire, a