A pneumatic tire comprising: a plurality of circumferential direction grooves (14, 16, 18) provided to a tread and extending along the tire circumferential direction; a land portion configured between an outermost circumferential direction groove disposed furthest to the outside in one tire width direction, and a second circumferential direction groove that is adjacent to the outermost circumferential direction groove; a plurality of lug grooves that extend from the outermost circumferential direction groove towards the tire equatorial plane side and are disposed sloped with respect to the tire equatorial plane at intervals along the tire circumferential direction, the lug grooves being configured so as to be in communication with the second circumferential direction groove, and the lug grooves being configured on the second circumferential direction groove side as shallow grooves that are shallower than at the outermost circumferential direction groove sides of the lug grooves; step portions that are adjacent to respective lug grooves, that have a step face that is raised from the groove bottom of the lug groove by a lower amount than the tread surface of the segment land portion, and that are formed from the end of the segment land portions at the outermost circumferential direction groove side across to the shallow grooves, at the side of the segment land portion arising from the land portion being segmented in the tire circumferential direction by the lug grooves, where a corner portion of the segment land potions on the outermost circumferential direction groove side is an acute angle; and arc shaped communication grooves (34, 36) formed in segment land portions arising from the land portion and being segmented in the tire circumferential direction by the lug grooves, the communication grooves (34, 36) communicating between the lug grooves adjacent to each other in the tire circumferential direction. a plurality of circumferential direction grooves (14, 16, 18) provided to a tread and extending along the tire circumferential direction; a land portion configured between an outermost circumferential direction groove disposed furthest to the outside in one tire width direction, and a second circumferential direction groove that is adjacent to the outermost circumferential direction groove; a plurality of lug grooves that extend from the outermost circumferential direction groove towards the tire equatorial plane side and are disposed sloped with respect to the tire equatorial plane at intervals along the tire circumferential direction, the lug grooves being configured so as to be in communication with the second circumferential direction groove, and the lug grooves being configured on the second circumferential direction groove side as shallow grooves that are shallower than at the outermost circumferential direction groove sides of the lug grooves; step portions that are adjacent to respective lug grooves, that have a step face that is raised from the groove bottom of the lug groove by a lower amount than the tread surface of the segment land portion, and that are formed from the end of the segment land portions at the outermost circumferential direction groove side across to the shallow grooves, at the side of the segment land portion arising from the land portion being segmented in the tire circumferential direction by the lug grooves, where a corner portion of the segment land potions on the outermost circumferential direction groove side is an acute angle; and arc shaped communication grooves (34, 36) formed in segment land portions arising from the land portion and being segmented in the tire circumferential direction by the lug grooves, the communication grooves (34, 36) communicating between the lug grooves adjacent to each other in the tire circumferential direction.