A lens drive device includes a lens holder for holding a lens; a cabinet to which the lens holder is attached so as to be capable of being displaced in a direction of an optical axis of the lens; and a drive part that uses a magnetic driving force to displace the holder in the direction of the optical axis. The drive part includes a magnet disposed on the lens holder and a coil opposed to the magnet. Here, the cabinet has a shape of an almost square in a direction perpendicular to the optical axis. Further, the drive part is disposed in a region R between an outer edge of the lens holder and a corner of the cabinet.