Several electrical effects like surface polarization, ion and electron emission, and after‐deformation thermo‐stimulated depolarization (ADTSD) accompany the high‐temperature deformation of CsI single crystals. From the dependencies of magnitude and polarity of induced current on degree and temperature of deformation it is concluded that positively charged dislocations and point defects of different types take part in the high‐temperature deformation of CsI single cystals. As a result spatial separation of the charges occurs in the field of point defects, the number of their types being the larger, the higher the deformation temperature is.