A lens driving device suppresses inward deformation of posts when the winding of a conductive wire generates a winding pressure. A lens driving device 1 includes a holder 10 that holds a lens unit 13. The holder 10 is movable in an optical axis direction of the lens unit 13. A magnet 20 surrounds the lens unit 13 in a radial direction of the lens unit 13. The magnet 20 is fixed to the holder 10. A coil 60 surrounds the holder 10 in the radial direction. The coil 60 faces the magnet in the radial direction. Posts surround the holder in the radial direction. The posts to which the coil is wound extends in the optical axis direction. A beam connects ends of the posts facing the same direction in the optical axis direction with each other. The beam is connected to each end of the posts.