Abstract: A magneto-electronic lock includes a key body having a magnetic combination. In the interior of a receiver of the key body are arranged magnetic detectors, a bolt, and an electronic circuit device connected between the bolt and the detectors. Positive and negative magnetization devices cooperate, depending on the position thereof, in opening, closing or blocking an electronic circuit including an electric opening pulse of a gate. A device determines the electric continuity both in the key and in the receiver thereof. An electric derivation device opens a code. Passive positive and negative relays are in combination with positive and negative magnetic elements. Positive and negative magnetic devices have potentials to act on the passive relays in the contact threshold.