<；P>；PROBLEM TO BE SOLVED: To enlarge the degree of freedom of designing a tubular article and facilitate rigid design. <；P>；SOLUTION: In a tubular article obtained by baking two or more layers of reinforcing fiber prepregs, two or more reinforcing fibers are plain-woven in one direction and a direction perpendicular to the direction of axes of the reinforcing fibers. The tubular article has a biaxial plain-woven fiber layer 4 composed of biaxial plain-woven prepregs impregnated with a thermoplastic resin and laminated together and a quadruple laminated fiber layer 5 composed of quadruple laminated prepregs laminated together, and the quadruple laminated fiber layer 5 is formed by arranging two or more fiber rows formed by arranging two or more reinforcing fibers in parallel, in one direction of the axes of the fiber rows and in a direction perpendicular to the direction of the axes of the fiber rows, in a direction intersecting obliquely with the axial direction of the resultant biaxial reinforcing fiber and in a direction intersecting with the axial direction of the resultant triaxial direction, laminating the fiber rows, with a clearance formed between fiber rows in the same axial direction, in the direction of the thickness of the tubular article and impregnating the resultant body with a thermoplastic resin to obtain a quadruple laminated prepregs and laminating the quadruple laminated prepregs. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
