An actuator using a permanent magnet comprises: a first core and a second core facing each other with a certain gap and having a space therein; a hollow bobbin coil fixedly installed at one side of the space for generating a magnetic force at the time of a current supply; a stator fixedly installed at another side of the space with a certain gap from the bobbin coil; a mover linearly moving in the space by a magnetic force generated by the bobbin coil, and having a rod portion exposed to outside of the first core and the second core; and a permanent magnet fixedly installed at an inner surface of the space for fixing the mover. In the actuator, one bobbin coil is provided thus to lower a production cost, and a driving function is enhanced. Accordingly, the actuator can be widely applied to a vacuum circuit breaker or a high speed transfer switch requiring a fast driving.