A neutralizer for electromagnetic radiation, particularly harmful radiation, caused by electro-magnetic fields from electric lines, installations, machines, appliances and apparatus includes a cylindrical body (1) with a semi-circular external groove (2) and two cylindrical chambers (4). A bar core (5) in the chambers (4) has solenoids (S) rotatably mounted thereon. Chambers (4) are hermetically closed by thread plugs (6). The difference in electrical potentials between the body (1) and the solenoid (S) causes a weak electric field of high frequency that annuls the effect of technical radiation in its environment.