A steel cord includes a core layer composed of three wires, an intermediate layer composed of seven wires, and an outer layer 12 composed of 13 wires. The space ratio of the intermediate layer is in the rante of from 25% to 34%, and the space ratio of the outer layer is in the range of from 10% to 20%. A tire manufactured by using the steel cord is also within the scope of the invention. <IMAGE>
