Provided is a double rope structure which is provided with an inner core and an outer cover. In the double rope structure, the inner core includes high strength and high modulus fibers with a yarn tenacity of 20 cN/dtex or higher and a yarn elastic modulus of 400 cN/dtex or higher, and has a ratio of yarn length/rope length of 1.005 or more and 1.200 or less, the rope length being determined as a length of a cut section (V) cut to a certain length from the rope structure, and the yarn length being determined as an average value of lengths of yarns constituting the inner core of the cut section (V).

Provided is a double rope structure which comprises an inner core and an outer cover. In the double rope structure, the inner core includes high strength and high modulus fibers with a yarn tenacity of 20 cN/dtex or more and yarn elastic modulus of 400 cN/dtex or more, and an inner-and-outer-layer suitability represented by the following formula (1) is 0.70 to 1.20. Formula (1): (a.sup.2/b.sup.2)/Vf100. In the formula (1), a represents the diameter of the outer periphery of the inner core, b represents the diameter of the outer periphery of the outer cover, and Vf represents the volume ratio (%) of the volume of the inner core to the total volume of the inner core and the outer cover.