Electric steering lock

An electric steering lock (1) having a metal supporting case (3); an electric motor (9); a catch (11) movable linearly and reversibly; and a transmission (13) interposed between a rotary output member (14) of the electric motor (9) and the catch (11). The supporting case (3) is formed in one piece, and houses and supports the electric motor (9), the catch (11), and the transmission (13).