An embodiment comprises: a base including a body having an opening, and a first post portion, a second post portion, a third post portion, and a fourth post portion which protrude from the body; a bobbin disposed on the body; a coil disposed around the bobbin; a first magnet disposed between the first post portion and the second post portion; a second magnet disposed between the third post portion and the fourth post portion; a lower elastic member coupled to the lower portion of the bobbin and the base; and an upper elastic member coupled to the upper portion of the bobbin and the first to fourth post portions, wherein the lower elastic member is disposed inside the first to fourth post portions of the base, and the lower elastic member is coupled to the base between the first post portion and the fourth post portion adjacent to the first post portion.