Abstract: An adjustable mounting assembly for a limit switch is disclosed which includes a stationary H-shaped base plate attachable to a machine table, a movable plate slidably mounted on the base plate upon which a limit switch is carried, an adjusting screw interconnecting the plates, and locking screws which are inserted through elongated slots in one of the plates into threaded holes in the other plate which lie along the centerline of the slots for locking the plates together once the desired position of the switch has been obtained. The assembly is adaptable for moving the switch along its longitudinal centerline, along a line parallel with the table and perpendicular to its longitudinal centerline, or in a direction normal to the table and perpendicular to its longitudinal centerline. The movable plate contains at least one tab which projects into one of two outwardly opening slots in the base plate which are separated by a cross member.