Driving device, optical apparatus, and image pickup apparatus

A driving device for driving an object to be driven, comprising:

• a columnar magnet extending in a direction along a predetermined axis, said magnet having a plurality of magnetized parts spirally extending along an outer peripheral surface thereof, and one end;
• first, second, third, and fourth yokes formed of a soft magnetic material, each of said yokes having at least one magnetic pole tooth disposed in opposed relation to a corresponding one of the magnetized parts of said magnet;
• a first coil for magnetizing said first yoke and said second yoke;
• a second coil for magnetizing said third yoke and said fourth yoke;
• a base plate to which said one end of said magnet is fixed;
• a combining member that integrally combines said first, second, third, and fourth yokes, and said first and second coils;
• and
• a holding member that holds the object to be driven and supports said combining member such that said combining member is movable in the direction along the predetermined axis,
• wherein said first and second coils are energized to move said magnet along said holding member in the direction along the predetermined axis to thereby drive the object to be driven.