Abstract: One embodiment comprises: a cover member including an upper plate and a side plate connected to the upper plate; a housing arranged in the cover member; a bobbin arranged in the housing; a coil coupled to the bobbin; a magnet which is arranged in the housing and faces the coil; a base arranged under the bobbin; and a first buffer unit arranged on the top surface of the bobbin corresponding to or facing the upper plate of the cover member, wherein the cover member includes a protrusion part extending in the direction toward the bobbin from the upper plate, and the distance in the optical axis direction between the protrusion part and the top surface of the bobbin is no greater than the distance in the optical axis direction between the first buffer unit and the inner surface of the upper plate of the cover member.