A pneumatic tire includes two cross belts having codes forming 5 to 30 degrees to a tire circumferential direction; a circumferential reinforcing layer having a width smaller than the cross belts, and having codes forming 0 to 5 degrees to the tire circumferential direction; and a carcass located inside, in a tire diameter direction, relative to a cross belt being inside among the cross belts. At 100% internal inflation pressure, a distance X1 between an equatorial plane and an outer edge of the circumferential reinforcing layer is 60% to 75% of a distance W between the equatorial plane and an outermost section of the carcass, and at 5% internal inflation pressure, a distance Y between the equatorial plane and a separation section of the carcass and a belt outwardly adjoining the carcass is 95% to 105% of a distance X2 between the equatorial plane and the outer edge.