Results are presented of measuring static voltage characteristics of biologically active sites Xe-gy at various pressure of the measuring electrode on the skin. It has been shown that under other equal conditions conductivity of the active sites is 3 and more times higher than that of inactive sites in the whole range of the applied pressures. The current-voltage characteristics of biologically active sites are non-linear and have a region of reversible break-down on their inverse branch. With the currents higher than 200 divided by 300 muA an irreversible break-down of the site is formed, after which conductivity increases more than by an order.