A pneumatic tire comprising a tread pattern formed in a tread portion, the tread pattern including: a circumferential direction main groove group constituted by four circumferential main grooves (11, 13, 15, 17) parallel to a tire circumferential direction, including two outer circumferential main grooves (11, 13) disposed on an outer side in a tire width direction and two inner circumferential main grooves (15, 17) disposed between the outer circumferential main grooves (11, 13), a centerline of the tire passing between the inner circumferential main grooves (15, 17); and a plurality of center lug grooves that traverse a region of a center land portion defined by the two inner circumferential main grooves (15, 17), wherein the centerline of the tire passes through the center land portion, to form a plurality of center land portion blocks in the region of the center land portion; wherein each of the two inner circumferential main grooves (15, 17) comprises a first groove wall and a second groove wall facing the first groove wall; two facing groove walls of each of the two outer circumferential main grooves are one of either the first groove walls or the second groove walls; the first groove wall comprises a first oblique wall element (W1a) that extends obliquely outward in the tire width direction from a first direction in the tire circumferential direction and a second oblique wall element (W1b) that extends obliquely inward in the tire width direction from the first direction and extends for a shorter length than the first oblique wall element (W1a), the first groove wall being made up of a plurality of sets of first oblique wall elements (W1a) and second oblique wall elements (W1b); and the second groove wall comprises a third oblique wall element (W2a) that extends obliquely inward in the tire width direction from the first direction and a fourth oblique wall element (W2b) that extends obliquely outward in the tire width direction from the first direction and extends for a shorter length than the third oblique wall element (W2a), the second groove wall being made up of a plurality of sets of third oblique wall elements (W2a) and fourth oblique wall elements (W2b), characterized in that the tread pattern further includes a plurality of intermediate lug grooves (33, 35) that traverse regions of two intermediate land portions (23, 25) defined by the outer circumferential main grooves (11, 13) and the inner circumferential main grooves (15, 17) to form a plurality of intermediate land portion blocks (24, 26) in the region of the intermediate land portions (23, 25). a circumferential direction main groove group constituted by four circumferential main grooves (11, 13, 15, 17) parallel to a tire circumferential direction, including two outer circumferential main grooves (11, 13) disposed on an outer side in a tire width direction and two inner circumferential main grooves (15, 17) disposed between the outer circumferential main grooves (11, 13), a centerline of the tire passing between the inner circumferential main grooves (15, 17); and a plurality of center lug grooves that traverse a region of a center land portion defined by the two inner circumferential main grooves (15, 17), wherein the centerline of the tire passes through the center land portion, to form a plurality of center land portion blocks in the region of the center land portion; wherein each of the two inner circumferential main grooves (15, 17) comprises a first groove wall and a second groove wall facing the first groove wall; two facing groove walls of each of the two outer circumferential main grooves are one of either the first groove walls or the second groove walls; the first groove wall comprises a first oblique wall element (W1a) that extends obliquely outward in the tire width direction from a first direction in the tire circumferential direction and a second oblique wall element (W1b) that extends obliquely inward in the tire width direction from the first direction and extends for a shorter length than the first oblique wall element (W1a), the first groove wall being made up of a plurality of sets of first oblique wall elements (W1a) and second oblique wall elements (W1b); and the second groove wall comprises a third oblique wall element (W2a) that extends obliquely inward in the tire width direction from the first direction and a fourth oblique wall element (W2b) that extends obliquely outward in the tire width direction from the first direction and extends for a shorter length than the third oblique wall element (W2a), the second groove wall being made up of a plurality of sets of third oblique wall elements (W2a) and fourth oblique wall elements (W2b),