The electrical properties of polymer composition materials with dispersed fillers have been investigated. The dependence of the conductivity on the concentration, the absorbed dose of γ-irradiation, and the temperature has been studied. The close connection of the electroconductivity of the compositions and the chemical nature of the fillers is shown. It has been found that the change caused by the interaction of the γ-irradiation with the fillers can considerably increase the electroconductivity of the polymeric composition.