A lens driving device includes: a lens carrier for fixing a lens barrel to the inside thereof; a driving unit for moving the lens carrier along the optical axis direction of the lens barrel; and an upper leaf spring and a lower leaf spring attached to the lens carrier in a manner that a surface of the each upper leaf spring and lower leaf spring is oriented orthogonal to the optical axis direction at an upper part and a lower part of the lens carrier and so that the lens carrier is supported in a manner to move freely in the optical axis direction of the lens barrel; wherein the lens carrier has an opening through which the lens barrel can be inserted from the direction intersecting the optical axis direction of the lens barrel.