Disclosed is a pneumatic tire having both lightweightness and improved durability. Specifically disclosed is a pneumatic tire wherein at least one of a carcass ply and a belt ply or a reinforcing cord in a belt reinforcing layer is composed of a para-aramid fiber cord, and the para-aramid fiber cord satisfies the relation represented by the following formulae (I)-(III). E = 32.14 T - 236 (I) E >= 150 (II) T <= 19 (III) (In the formulae, E represents an elastic modulus (cN/dtex) at a load of 49N at 25 DEG C, and T represents a tensile strength (cN/dtex).).