Concentration and frequency dependences of electroresistance (ρ) and dielectric characteristic (ε’ , tgδ) of glasses of
2Bi2O3 .3SiO2–Bi2O3.B2O3(0-50 mol.% Bi2O3.B2O3) system has been examined. Electron-ion and partially polarization processes, which take place in samples, determine the investigated properties of these materials.