To enhance a traction property at acceleration while ensuring controllability and stability.

A band layer 7 in which a band cord 10 in helically wound in a tire circumferential direction is provided at an outer side of a carcass 6 of a bias structure or a semi-radial structure. The band cord 10 includes a steel cord 11 in which the N number of secondary strands 13 are twisted by upward twisting, and the secondary strands 13 is formed by further twisting the M number of primary strands 12 in which the L number of steel strands f having a wire diameter d of 0.08-0.20 mm are twisted by downward twisting by middle twisting. The steel cord 11 has a low elastic area Y1 reaching from the origin to a point of inflection P in the load-elongation curve and a high elastic area Y2 exceeding the point of inflection P, and the point of inflection P is in a range of elongation of 2-7%, and the load at 2% elongation is further made to 60 N or less.