A pneumatic tire having an internal half of a tread surface from a tire equatorial plane in a state that the pneumatic tire is mounted on a vehicle, the internal half having a plurality of internal circumferential main grooves (2a, 2b) extending in a tread circumferential direction and an internal land portion defined by two internal circumferential main grooves (2a, 2b) adjacent to each other, and also having an external half of the tread surface from the tire equatorial plane in the state that the pneumatic tire is mounted on the vehicle, the external half having a plurality of external circumferential main grooves (3a, 3b) extending in the tread circumferential direction and an external land portion defined by two external circumferential main grooves (3a, 3b) adjacent to each other, the pneumatic tire comprising: in the internal land portion, a plurality of first resonators, each made up of a first sub-groove with both ends terminating in the internal land portion, and one first branch groove with a groove width narrower than the first sub-groove and opening to the first sub-groove and one of the two internal circumferential main grooves; and in the external land portion, a plurality of second resonators, each made up of a second sub-groove with both ends terminating in the external land portion and a second branch groove with the groove width narrower than the second sub-groove and opening to the second sub-groove and one of the two external circumferential main grooves, and characterized by: each first resonator being made up as well of another first branch groove with the groove width narrower than the first sub-groove and opening to the first sub-groove and the other one of the two internal circumferential main grooves, and the pneumatic tire comprising, in the external land portion, a plurality of third resonators, each made up of a third sub-groove with both ends terminating in the external land portion and a third branch groove with the groove width narrower than the third sub-groove and opening to the third sub-groove and the other one of the two external circumferential main grooves, wherein groove volumes of the second resonator and the third resonator are smaller than the groove volume of the first resonator. in the internal land portion, a plurality of first resonators, each made up of a first sub-groove with both ends terminating in the internal land portion, and one first branch groove with a groove width narrower than the first sub-groove and opening to the first sub-groove and one of the two internal circumferential main grooves; and in the external land portion, a plurality of second resonators, each made up of a second sub-groove with both ends terminating in the external land portion and a second branch groove with the groove width narrower than the second sub-groove and opening to the second sub-groove and one of the two external circumferential main grooves, and characterized by: each first resonator being made up as well of another first branch groove with the groove width narrower than the first sub-groove and opening to the first sub-groove and the other one of the two internal circumferential main grooves, and the pneumatic tire comprising, in the external land portion, a plurality of third resonators, each made up of a third sub-groove with both ends terminating in the external land portion and a third branch groove with the groove width narrower than the third sub-groove and opening to the third sub-groove and the other one of the two external circumferential main grooves, wherein each first resonator being made up as well of another first branch groove with the groove width narrower than the first sub-groove and opening to the first sub-groove and the other one of the two internal circumferential main grooves, and the pneumatic tire comprising, in the external land portion, a plurality of third resonators, each made up of a third sub-groove with both ends terminating in the external land portion and a third branch groove with the groove width narrower than the third sub-groove and opening to the third sub-groove and the other one of the two external circumferential main grooves, wherein groove volumes of the second resonator and the third resonator are smaller than the groove volume of the first resonator.