Problem to be solved: to provide an aqueous processing code without using an organic solvent in the manufacturing process, and a method of manufacturing a rubber reinforcing fiber cord having sufficient adhesion to the rubber and having sufficient adhesive strength in the longitudinal direction of the cord.Solution: the rubber reinforcing fiber cord having the content of toluene or xylene is 10 ppm or less relative to the fiber content, and when the portion of the cord is removed from the composite of the rubber and the cord, and the portion which is in contact with the rubber prior to the detachment of the code is observed, the flocculation fracture can be substantially applied to the above described portion Rubber reinforcing fiber cord that is attached to the rim.No selection
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