A filtration apparatus that removes chips from a chip-containing machining fluid is applied which effectively prevents clogging of a filtration filter that makes up the apparatus. A filtration apparatus 1 is provided with a magnet 9 attached to an outer wall surface of a drum housing chamber 5, the magnet 9 functions as means for fixing chips in the machining fluid that flows into the drum housing chamber 5 from an inlet 16 on a bottom surface 5B or a slope 5A of the drum housing chamber 5 by a magnetic force, and the periphery of the inlet 16 is configured as a magnet non-existent section 17 where the magnet 9 does not exist so as to suppress a phenomenon that chips in the machining fluid are fixed near a top edge of the slope 5A of the drum housing chamber 5 by the magnetic force of the magnet 9.