A magnetic circuit, an optical pickup actuator, an optical recording and/or reproducing apparatus using the magnetic circuit, and method of the same, wherein the magnetic circuit includes a plurality of focus coil units each of which includes a first focus coil and a second focus coil, and a magnet including a plurality of magnet portions which interact with the plurality of focus coil units and each of which is polarized in a direction opposite to adjacent magnet portions thereamong. Here, electromagnetic forces act on the first and second focus coils in each focus coil unit in a same direction in response to focus driving signals and in opposite directions in response to tilt driving signals, with the first and second focus coils in each focus coil unit have different effective coil lengths.