[en] Full Text: The influence of thermal treatment and treatment by the liquid nitrogen of cocons, on electric properties of the natural silk fibroin has been studied. It has been established that the polarization (ε) and tangent of angle of dielectric losses (tangent δ) increase with the growth of amorphous sectors, that corresponds to the sample received from cocons, treated by the liquid nitrogen. Moreover the dielectric constant tangent of the loss angle and the electroconductivity of the fibroin, received from cocons treated by the liquid nitrogen are on 10% more in comparison with the fibroin received from cocons treated by the heated air and ultrahigh frequency (UHF) field