The drive unit 1 includes a tubular fixed part 2 with a given axis C as center, a tubular movable part 3 located inside of the fixed part 2 and having the axis C as center, and a voice coil motor 10 capable of moving the movable part 3 relatively with respect to the fixed part 2 in the axial direction by a coil 11 located in the fixed part 2 and a magnet 12 located in the movable part 3. In a state where the magnet 12 is placed in the movable part 3, a first distance L1 from the axis C to the diametrically outer surface 121 of the magnet 12 is longer than a second distance L2 from the axis C to the inner circumference surface 23 of the fixed part 2.
