Abstract: An ignition switch lock for preventing unauthorized access to the ignition switch of an automobile or similar vehicle is disclosed. The ignition switch lock includes a housing, one end of which is shaped to conform to the contours of a steering column. The device further includes a pair of movable jaws which may be moved into engagement with and locked around the rotatable portion of the ignition switch, and means for selectively controlling the movement of the jaws for securement of the device to the steering column.