Abstract: Tire cord having enough high tensile strength, high initial modulus, and high fatigue resistance required for radial tire and belted bias tire can be obtained from polyvinyl alcohol polymer. Said cord is constituted by multifilament yarns composed of a polyvinyl alcohol polymer having a degree of polymerization of at least 2000, having a tensile strength of 15 g/d or more and an initial modulus of 250 g/d or more, and undergoing substantially no fusion between single filaments. It has cord properties of not less than 8.5 g/d in tensile strength, 0.5 to 2.2% in middle degree of elongation (MDE), and 0.2 to 2.0% in dry heat shrinkage factor (.DELTA.S).