STEEL CORD FOR RUBBER ARTICLE REINFORCEMENT, AND TIRE

Provided is a steel cord for rubber article reinforcement, which has both the tensile strength in the cord axial direction and the strength in the shear direction at higher levels. A steel cord () for rubber article reinforcement includes: a single core strand () having a layer-twisted structure; and plural sheath strands () each having a layer-twisted structure, and the sheath strands () are twisted around the core strand (). In the sheath strands (), a ratio between the diameter of a core filament () and the diameter of a sheath filament () is 0.75 to 0.85, and a ratio between the strength of the core filament () and the strength of the sheath filament () is 0.55 to 0.7.