Impact of fullerenes C60 on dielectric rest, electrical conductivity, and electro-optic properties of nematic liquid crystal Four-cyano-Four′-pentylbiphenyl is investigated. It’s proven that the inclusion of fullerenes into liquid crystal results in reducing of the clearing temperature and the order parameter. On this case, the transverse part of the true a part of dielectric permittivity will increase whereas the longitudinal part decreases. A most of dielectric absorption shifts to the low-frequency area. The seize of shifting ions by fullerenes results in a lower of electrical conductivity. The elastic fixed, rotational viscosity and switching occasions lower whereas the edge voltage of Freedericksz impact will increase.