To reduce a size of a magnetic driver which drives a permanent magnet by the magnetic fields of solenoid coils, and moreover to generate a stronger driving force.

To generate magnetic fields in directions opposite to each other, two air-core coils 22, 23 are arranged linearly causing their axes to coincide. Between the air-core coils 22, 23, a magnetic flux focusing core 21 of a ferromagnetic substance with a hole is interposed. A permanent magnet is inserted into the air-core portions of the coils 22, 23, and a driving unit 26 is formed. When left driving currents are caused to flow in the coils 22, 23 in directions shown in the drawing, the south pole of the driving unit 26 is attracted by an north pole inside the core 21, and moves left. When right driving currents are caused to flow in the coils 22, 23 in directions reverse to those shown in the drawing, the driving unit 26 moves right. By converging the magnetic fluxes of the two coils 22, 23 into the core 21, the driving unit 26 for the permanent magnet can be driven by a larger force in spite of a smaller size.