A method of producing a reinforcing fiber woven fabric, for producing on a weaving machine a reinforcing fiber woven fabric from wefts of reinforcing fiber yarns and warps of reinforcing fiber yarns, the method comprising providing, on a weft supply passage for supplying a weft from a weft bobbin to the weaving machine, a weft unwinding means for laterally unwinding weft from the weft bobbin, and a weft storing cylinder body for sucking , along with air, part of weft thus unwound and directed toward the weaving machine and temporarily storing it therein, contactingly supporting weft, minimized in generation of twist by means of lateral unwinding, by a weft contacting means provided in the weft storing cylinder body while being stored in the weft storing cylinder, and preventing the generation of twist of weft being stored by the supporting; a production device therefore, and a reinforcing fiber woven fabric produced therefrom. IMAGE
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