A magnetic coupled actuator includes a lens which is movable in an optical axis direction AX, a lens frame which is coupled with the lens, a lens barrel which seals and accommodates the movable lens and the lens frame to be airtight, a permanent magnet which is disposed at an outer side of the lens barrel, facing the lens frame, and is disposed to be movable in the optical axis AX direction, and a wire of which, one end is coupled with the permanent magnet, and which moves the permanent magnet in the optical axis AX direction. At least one of the lens frame and the permanent magnet is a magnetic field generating means.