Traditional lenses for static magnetic field concentration are often closed structures and the enhanced DC magnetic fields are inside these structures. The static magnetic flux diverges very quickly in the free space outside these closed lenses. In this paper, we extend the Mikaelian’s lens which has been widely used for focusing the light wave to design a non-closed DC magnetic lens which can concentrate the DC magnetic field and give a good DC magnetic field enhancement in free space regions even after a certain distance from the back surface of the lens. Numerical simulations verify the performance of the device.