A keyless anti-theft device comprising a security part, a gearbox, a gearbox lever, a gearbox lever locking means and a drive mechanism for the locking means, wherein the security part is made in the form of a set of code and false keys with rods mounted into the gearbox by means of seals and connected by means of three-dimensional levers to drive mechanism weights, of the locking means having the form of a rocker arm vertically pivotable about an axis, wherein a locking end of the rocker arm is provided with a limiter for limiting the travel of a gearbox lever adapted for interacting with a stop piece rigidly connected to the gearbox lever, wherein the device is provided with a limiter for limiting the rocker arm locking end descending travel, characterized in that said three-dimensional levers are connected to the weights, through flexible ties, wherein all the weights are freely arranged in open-top baskets rigidly connected to said rocker arm and equipped with tongues preventing the weights, from falling out of the baskets, the baskets being arranged longitudinally on either side of the rocker arm mounting axis in at least one horizontal row, wherein the rocker arm locking part has baskets rigidly attached thereto, wherein the tightening weights of the baskets are connected to the false keys, and the other, i.e. the ballast, part of the rocker arm has baskets rigidly attached thereto being able to receive at least three counterweights connected to the code keys, wherein the ratio of the total weights of each rocker arm locking and ballast parts is obtained in order to allow the rocker arm pivoting towards the ballast part when loaded with a set of counterweights; and pivoting towards the locking part when loaded with at least one tightening weight when the ballast part baskets are completely loaded or the rocker arm locking and ballast parts are not loaded at all, wherein the travel of each of said code key rods and the travel of associated counterweight is equal to the value B, thus allowing the latters stopping at the bottom of the basket of the rocker arm ballast part in the locked position of the gearbox lever, wherein the value B is inherent to all the false key tightening weights, whereby the distance between the bottom of the false key baskets, more remote from the arm rocker axis, within the rocker arm locking part, and the weights when they are in contact is equal to the sum of B + K 2, wherein the value K 2 is less than the travel K 1 of the rocker arm locking means till the gearbox lever coming out of the stop piece interaction, and the value B is not less than the value K 1, wherein each of the rods is equipped with a rotation limiter and axial movement limiters limiting the axial up and down movement and with an upper position stop performed as a hinge pedestal, wherein the security part is equipped with a means for balancing the total weight of all the moveable elements, wherein in the gearbox upper part a vane-type fixer is arranged to fix the rocker arm open position, and said weights, i.e. counterweights and tightening weights, are made of magnetically resistant materials, the gearbox lever and rods being passed through a support plate.