Abstract: The present invention prevents core deformation at a time of mounting a tire on a rim while corrosion resistance and air-leak resistance are assured in a tire made with a inner molding process. A bead core comprises axially inner and outer core pieces, and a radially inner end part of a carcass ply is held therebetween. The axially inner and outer bead pieces are composed of a spiral-wound body in which a bead wire has been spirally wound and overlapped. The bead wire comprises a core part in which core strands have been twisted together and a sheath part in which sheath strands have been twisted together around the core part. The core strands and/or the sheath strands comprise an embossed strand. The twisting direction and twisting pitch (Pc) of the core strands are the same as the twisting direction and twitching pitch (Ps) of the sheath strands.