Influence of single-walled carbon nanotubes modified by COOH group on the dielectric properties of homogeneous 6СНВТ liquid crystal (LC) and dispersed 6СНВТ LC in the polymer matrix (PDLC) is studied in the 10−1–106Hz frequency range. It is shown by scanning electron microscopy that the sizes of LC droplets in a polymer matrix are <1μm and the presence of nanotubes does not effect on them. With the nanotube concentration of 0.2wt.%, the electric conductivity of a homogeneous LC is decreased more than twice. For the LC electric conductivity decrease, the saturation effect is typical which may be caused by the selective adsorption of ions by nanotubes in LC. Reducing of the ionic conductivity component occurs also with adding of the nanotubes into PDLC.