A monostable permanent magnetic actuator using a laminated steel core, comprises: lamination cores formed as a plurality of metallic thin plates are laminated to each other; a coil disposed to be adjacent to the lamination cores, and configured to apply a magnetic force to the lamination cores by an external power; a mover mounted in the lamination cores so as to be movable in upper and lower directions; permanent magnets installed at the lamination cores, and configured to apply an upward and downward magnetic force to the mover; and an elastic means configured to apply an elastic force to the mover in an opposite direction to the permanent magnets.