Pneumatic tire

A pneumatic tire comprises a bead portion (3), a carcass (4) wound around a bead core (5) having a polygonal form from the inside of the tire toward the outside thereof in a radial direction, and a bead filler (7) arranged on an outer periphery of the bead core (5), wherein a reinforcing layer (8) comprised of an organic fiber cord(s) or a metal wire(s) extended substantially in a circumferential direction of the tire is arranged in a position adjacent to the bead filler (7).