A cable-management system that holds a plurality of cables (28, 29) arranged in a rotary joint connected to an articulated arm, said articulated arm including two rotary shaft portions (18, 19), said rotary shaft portions (18, 19) allowing the articulated arm to rotate on an axis given thereto, a first rotary shaft portion being fixed and a second rotary shaft portion being rotatable, the cable-management system facilitating rotation from a first angular position to a second angular position without damage to the cables (28, 29), characterized in that, the cables (28, 29) consist of an outer group of cables and an inner group of cables; and the cable-management system comprises a first cable guide, a second cable guide and at least four fixing members, wherein: the first cable guide has a circular tube-shaped space, and the outer group of cables is partly accommodated between the first cable guide and the second cable guide; the second cable guide has a circular tube-shaped space, and the inner group of cables is partly accommodated between the second cable guide and the first rotary shaft portion; and the fixing members respectively secure both ends of the outer group of cables and the inner group of cables on and along the first and second rotary shaft portions (18, 19) in a form in which the cables (28, 29) are arranged in parallel with each other, so that remaining portions of the outer group of cables and the inner group of cables are bent and suspended along the first and second rotary shaft portions (18, 19) in a U-shape. the cables (28, 29) consist of an outer group of cables and an inner group of cables; and the cable-management system comprises a first cable guide, a second cable guide and at least four fixing members, wherein: the first cable guide has a circular tube-shaped space, and the outer group of cables is partly accommodated between the first cable guide and the second cable guide; the second cable guide has a circular tube-shaped space, and the inner group of cables is partly accommodated between the second cable guide and the first rotary shaft portion; and the fixing members respectively secure both ends of the outer group of cables and the inner group of cables on and along the first and second rotary shaft portions (18, 19) in a form in which the cables (28, 29) are arranged in parallel with each other, so that remaining portions of the outer group of cables and the inner group of cables are bent and suspended along the first and second rotary shaft portions (18, 19) in a U-shape. the first cable guide has a circular tube-shaped space, and the outer group of cables is partly accommodated between the first cable guide and the second cable guide; the second cable guide has a circular tube-shaped space, and the inner group of cables is partly accommodated between the second cable guide and the first rotary shaft portion; and the fixing members respectively secure both ends of the outer group of cables and the inner group of cables on and along the first and second rotary shaft portions (18, 19) in a form in which the cables (28, 29) are arranged in parallel with each other, so that remaining portions of the outer group of cables and the inner group of cables are bent and suspended along the first and second rotary shaft portions (18, 19) in a U-shape.