A compact lens module includes a lens seat, a lens group, a first and a second circuit boards. The lens seat includes a top surface, a bottom surface opposite to the top surface, and a first side surface connecting the top surface to the bottom surface. The lens seat defines a receiving space extending through the top surface and the bottom surface, and a receiving groove on the first side wall. The lens group is received in the receiving space. The first circuit board is mounted on the bottom surface of the lens seat, and holds an image sensor aligned with the lens group. The second circuit board is received in the receiving groove. The second circuit board holds a lens drive circuit and electrically connected with the lens group and the first circuit board.