A pneumatic tire having a tread part partitioned by four main grooves (14, 16, 18, 20) extending in a tire circumferential direction, the tire comprising: a center land part; an outer intermediate land part adjoining a vehicle installation outer side of the center land part; an inner intermediate land part adjoining a vehicle installation inner side of the center land part; an outer shoulder land part adjoining a vehicle installation outer side of the outer intermediate land part; and an inner shoulder land part adjoining a vehicle installation inner side of the inner intermediate land part, wherein a center lug groove having a smaller width on a vehicle installation outer side than on a vehicle installation inner side is formed in the center land part, the outer intermediate land part has a width larger than a width of the inner intermediate land part, the outer shoulder land part has a width larger than a width of the inner shoulder land part, the outer intermediate land part has an outer intermediate first lug groove having both ends in a tire transversal direction communicating with main grooves (14, 18), and an outer intermediate second lug groove having one end on a tire transversal outer side communicating with a main groove and the other end on a tire transversal inner side terminating in the outer intermediate land part, the outer intermediate first lug groove and the outer intermediate second lug groove are arranged alternately in a tire circumferential direction, the inner intermediate land part has an inner intermediate first lug groove having both ends in a tire transversal direction communicating with main grooves (16, 20), and an inner intermediate second lug groove having one end on a tire transversal inner side communicating with a main groove and the other end on a tire transversal outer side terminating in the inner intermediate land part, and the inner intermediate first lug groove and the inner intermediate second lug groove are arranged alternately in a tire circumferential direction, characterised in that an outer circumferential sipe extending in a tire circumferential direction is formed in the outer shoulder land part, and an inner circumferential narrow groove extending in a tire circumferential direction and having a width larger than a width of the outer circumferential sipe is formed in the inner shoulder land part. a center land part; an outer intermediate land part adjoining a vehicle installation outer side of the center land part; an inner intermediate land part adjoining a vehicle installation inner side of the center land part; an outer shoulder land part adjoining a vehicle installation outer side of the outer intermediate land part; and an inner shoulder land part adjoining a vehicle installation inner side of the inner intermediate land part, wherein a center lug groove having a smaller width on a vehicle installation outer side than on a vehicle installation inner side is formed in the center land part, the outer intermediate land part has a width larger than a width of the inner intermediate land part, the outer shoulder land part has a width larger than a width of the inner shoulder land part, the outer intermediate land part has an outer intermediate first lug groove having both ends in a tire transversal direction communicating with main grooves (14, 18), and an outer intermediate second lug groove having one end on a tire transversal outer side communicating with a main groove and the other end on a tire transversal inner side terminating in the outer intermediate land part, an outer intermediate first lug groove having both ends in a tire transversal direction communicating with main grooves (14, 18), and an outer intermediate second lug groove having one end on a tire transversal outer side communicating with a main groove and the other end on a tire transversal inner side terminating in the outer intermediate land part, the outer intermediate first lug groove and the outer intermediate second lug groove are arranged alternately in a tire circumferential direction, the inner intermediate land part has an inner intermediate first lug groove having both ends in a tire transversal direction communicating with main grooves (16, 20), and an inner intermediate second lug groove having one end on a tire transversal inner side communicating with a main groove and the other end on a tire transversal outer side terminating in the inner intermediate land part, and an inner intermediate first lug groove having both ends in a tire transversal direction communicating with main grooves (16, 20), and an inner intermediate second lug groove having one end on a tire transversal inner side communicating with a main groove and the other end on a tire transversal outer side terminating in the inner intermediate land part, and the inner intermediate first lug groove and the inner intermediate second lug groove are arranged alternately in a tire circumferential direction, characterised in that an outer circumferential sipe extending in a tire circumferential direction is formed in the outer shoulder land part, and an inner circumferential narrow groove extending in a tire circumferential direction and having a width larger than a width of the outer circumferential sipe is formed in the inner shoulder land part.