CORD, RUBBER-CORD COMPOSITE STRUCTURE, AND TIRE

An object of the present invention aims to provide a cord formed by twisting purified polysaccharide fibers which are manufactured by using a raw material with a low environmental impact and do not emit carbon disulfide, in which the cord is able to confer durability and resistance to external damage to a tire when the cord is used in the tire. A cord is provided formed by bringing a polysaccharide solution which is formed by dissolving a polysaccharide raw material in a liquid including an ionic liquid in contact with a solidifying liquid, and by twisting raw yarn which is purified polysaccharide fibers formed by spinning polysaccharides, in which a relationship between tenacity TB (cN/dtex) of the raw yarn at 25°C and elongation at break EB (%) of the raw yarn at 25°C satisfies the following expression (1) and the following expression (2), and a twisted yarn tenacity utilization rate (CT/TB) at the time of setting cord tenacity at 25°C to CT (cN/dtex) when the raw yarn is twisted to be a cord is greater than or equal to 70%.