A lens driving device, comprising: a cover member and a housing member, each comprising: a first lateral surface; a second lateral surface disposed opposite to the first lateral surface; a third lateral surface between the first lateral surface and the second lateral surface; and a fourth lateral surface disposed opposite to the third lateral surface; wherein the housing member is disposed in the cover member; a bobbin disposed in the housing member; a coil unit disposed around an outer peripheral surface of the bobbin; first and second driving magnets facing the coil unit, wherein the first and second driving magnets are fixed to the first lateral surface and the second lateral surface of the housing member by an adhesive, respectively; an upper elastic member coupled to an upper surface of the bobbin; a lower elastic member coupled to a lower surface of the bobbin; a sensing magnet; a position sensor; and a first circuit board coupled with the position sensor; wherein the housing member has side surfaces with a column shape, wherein the first and second driving magnets disposed on the column shape face the bobbin;wherein the sensing magnet is coupled to the bobbin, wherein the sensing magnet is disposed on a side wall, among side walls of the bobbin, positioned toward the third lateral surface of the cover member, and wherein the position sensor faces the sensing magnet and is configured to sense movement of the bobbin in a first direction along or parallel to an optical axis direction of a lens, wherein the sensing magnet is not overlapped with the coil unit in a third direction perpendicular to the first direction and perpendicular to the fourth lateral surface, wherein the sensing magnet is not overlapped with the third lateral surface of the cover member in the third direction. a cover member and a housing member, each comprising: a first lateral surface; a second lateral surface disposed opposite to the first lateral surface; a third lateral surface between the first lateral surface and the second lateral surface; and a fourth lateral surface disposed opposite to the third lateral surface; wherein the housing member is disposed in the cover member; a first lateral surface; a second lateral surface disposed opposite to the first lateral surface; a third lateral surface between the first lateral surface and the second lateral surface; and a fourth lateral surface disposed opposite to the third lateral surface; wherein the housing member is disposed in the cover member; a bobbin disposed in the housing member; a coil unit disposed around an outer peripheral surface of the bobbin; first and second driving magnets facing the coil unit, wherein the first and second driving magnets are fixed to the first lateral surface and the second lateral surface of the housing member by an adhesive, respectively; an upper elastic member coupled to an upper surface of the bobbin; a lower elastic member coupled to a lower surface of the bobbin; a sensing magnet; a position sensor; and a first circuit board coupled with the position sensor; wherein the housing member has side surfaces with a column shape, wherein the first and second driving magnets disposed on the column shape face the bobbin;wherein the sensing magnet is coupled to the bobbin, wherein the sensing magnet is disposed on a side wall, among side walls of the bobbin, positioned toward the third lateral surface of the cover member, and wherein the position sensor faces the sensing magnet and is configured to sense movement of the bobbin in a first direction along or parallel to an optical axis direction of a lens, wherein the sensing magnet is not overlapped with the coil unit in a third direction perpendicular to the first direction and perpendicular to the fourth lateral surface, wherein the sensing magnet is not overlapped with the third lateral surface of the cover member in the third direction.