In order to study the relationship between drape coefficients and bending vibrational parameters of fabrics, grey relationship analysis was applied and the degree of the relationship was investigated. Following conclusions were obtained : 1) The degree of relationship to drape coefficient was in the order of Δd1>S2>P>B>S1> Δd2 >2HB > T. The degree of Δd1 (amplitude decrease of the 1st step), S2 (vibration duration period of the 1st step and the 2nd step) was larger than that of B, 2HB and thdegree of S1 (vibration duration period of the 1st step), Δd2 (amplitude decrease of the 2nd step) was similar to that of B, 2HB. Fabric drapability could be explained by bending vibrational parameters, Δd 1, Δd2, S1 andS2, more suitably than by pure bending parameters, B, and 2HB. 2) The degree of threads in cloth P, is high to drape coefficient and the effect of P is larger than yarn twist T, on drapability. 3) The degree of relationship of threads in cloth and yarn twist to vibrational parameters is high, however, the former is larger.