Abstract: A magnetic filter according to one embodiment of the present disclosure includes a housing through which fluid or powder containing metal particles passes; magnets arranged inside the housing; and a rotation unit that rotates the magnets so as to revolve around the rotation center, wherein the magnets include first magnets and second magnets located farther from the rotation center than the first magnets, and wherein any one of the second magnets forms an equilateral triangle arrangement with two first magnets adjacent to any one of the second magnets.