An improvement of locking lever for use in office automation apparatuses such as a facsimile, a laser printer, a copying machine, etc. The improvement includes a lever having two end portions, for transferring power; a knob mounted fixedly on a central portion of the lever, for rotating the lever in a given direction of locking/unlocking the locking apparatus; and a pair of locking metals attached to the two end portions, for isolating the locking metals onto an object encountered.