Thin film of poly(5-isopropylidenecyclo-1,4-vinylene-2,3-dicarboxylicacidamide-s-methyl hydrazinecarbodithioate) (II) (Scheme 1) of 5 mu m thickness was prepared. The dielectric properties of the prepared sample were studied as a function of frequency and temperature, and the results were analyzed by the Cole-Cole method. The optical permittivity and the de-conductivity have been deduced, and the activation energy has been calculated and found to be 0.023 eV. Also, a detailed study of optical absorption is presented. The optical absorption spectra were measured in the wavelength range from 200-600 nm. The calculated absorption coefficient, absorption index, and determined values of energy gaps (E-opt(d), E-opt(i) and Delta E) are presented. The results indicate that both mechanisms of direct and indirect transitions exist.