Abstract: An apparatus for dismantling filter inserts, especially disposable oil filters which comprise a filter paper element and an internal metal supporting tube, as well as metal end plates. The apparatus has two support rails 15 and 16 with upper edges formed as cutting edges. The support rails are mounted in a frame 11 for displacement transversely toward or away from each other to vary the spacing between them. Vertically above and perpendicular to the direction of displacement of the two support rails is a platen 26 driven by a compressed-air cylinder 24 or the like to move along the perpendicular such that the platen will compress a filter insert 19 placed upon the two support rails and sever the end plates 21 and 22 from the filter paper element 20.