This disclosure provides a voice coil motor, including a magnet holder, a magnet set, a lens holder, a lens set, an upper and lower elastic piece and a circuit board. The magnet set has four magnets mounted on four sides of the magnet holder, each of the magnets having opposing N/S and S/N magnetic poles. The lens set is disposed in the lens holder. The upper and lower elastic pieces are mounted above and below the lens holder, respectively. Four focusing coil loops are disposed between the lens holder and magnet set, and correspond to the four magnets of the magnet set. Four optical image stabilization coil loops are disposed on the circuit board and correspond to the four magnets of the magnet set, respectively. The focusing coil loops and optical image stabilization coil loops share the magnet set. Therefore, the voice coil motor has a size reduced.