The invention provides a voice coil motor and a brush unit using the voice coil motor which are characterized by comprising: a stator including a magnetic circuit constituted by a permanent magnet magnetized in a predetermined direction and a yoke; a mover having one end side coupled to a member to be driven, including an air core coil orthogonal to the magnetic flux of the permanent magnet, and supported to the stator in a linearly movable manner; and a spring for making an elastic force act on the mover in a direction toward which the member to be driven moves away from the stator.