To provide a unidirectional carbon fiber woven fabric which has an excellent draping property and an excellent matrix resin-impregnating property, even when the Metsuke (4.3560 g/m2, a weight unit) of the woven fabric is large, is inexpensive, exhibits high strength characteristics, and has a large degree of freedom on designs such as the specification of warps and the Metsuke of the woven fabric, to provide a method for producing the woven fabric, and to provide a concrete structure reinforced with the woven fabric.

The unidirectional carbon fiber woven fabric which comprises wefts and warps comprising non-twisted carbon fiber yarns comprising many carbon fibers is, characterized in that the warps are non-twisted doubled warps obtained by doubling plural non-twisted yarns and that the doubled warps and the wefts are bound to each other. The method for producing the unidirectional carbon fiber woven fabric is characterized by doubling the arbitrary number of unwound warps to form the non-twisted doubled warps, weaving the non-twisted doubled warps with wefts to form a preliminary woven fabric, passing the preliminary woven fabric through a heating and pressurizing device to deform the doubled warps into a non-twisted flat shape and simultaneously fuse a thermoplastic resin contained in the wefts, thereby binding the wefts to the doubled warps. The reinforced concrete structure is characterized by having a carbon fiber-reinforced plastic layer containing the woven fabric on the surface of the structure.