RUBBER REINFORCING MATERIAL AND METHOD FOR PRODUCING SAME, AND RUBBER ARTICLE

An adhesive composition for an organic fiber cord, the adhesive composition containing: a graft copolymer; and a surfactant, in which the graft copolymer has a chloroprene polymer chain and a graft chain bonded to the chloroprene polymer chain, the graft chain includes a structural unit derived from an ethylenically unsaturated carboxylic acid, a molar ratio of a content of oxygen atom with respect to a content of chlorine atom in the graft copolymer is 0.04 to 1, and a solid content concentration of the adhesive composition is 10 to 50% by mass.