Abstract: A magnetic fuel purifier with double purifying effect for liquid fuel and the like equipped with an inner pre-purifier rotating around a center shaft and an outer purifier, where the fuel passes through an especially sintered bronze ball filter. Further, the center shaft at the bottom is equipped with a rigidly applied surrounding magnet 6 to pick up magnetic particles from the fuel. The case for the fuel purifier is made from transparent non-magnetic material that is as clear as glass to make it easier to check when the purifier is filled with contaminations and needs to be emptied and cleaned.