Polymer with the donative side chain was obtained by radical polymerization from 2-methyl -vinylimidazole. The charge transfer complexes (CT-complex) were synthesized from polyvinylimidazole with various organic acceptors having different electron affinity. Benzoquinone (BQ), Chloranil (CA), Bromanil (BA), Tetracyanoquinodimethane (TCNQ) and Picric acid (PA) were used as acceptor compounds. Spectrophotometric measurement revealed the formation of charge transfer states shifts the absorption band into the visible region. Job's continuous method, infrared spectra and solution viscosity of CT-complex indicate the structure of CT-complex is a 2:1 or 1:1 complex with the acceptor with respect to the monomer unit of the polymer. Especially the formation mole ratio of donor to acceptor was decided from the maximum at the reduced viscosity-concentration curves. Electrical conductivity was found to be in the following order of electron acceptors; CA>>PA≅TCNQ>BQ for dark conductivity and CA>>TCNQ≅PA for photo-conductivity in the visible region. The dark and photo-conductivity of the charge transfer polymer formed by various acceptor molecules was not seen to be simply related to the electron affinities of these molecules.