The invention concerns a device for aftertreatment of a hot exhaust gas flow (2), in particular of a diesel engine, comprising a ceramic filter body (1) of a ceramic material (6) with gas passages (18, 18′). The filter body (1) is formed unitarily of at least one fiber web (4, 4′), in particular paper, impregnated with the ceramic material (6) with formation of the gas passages (18, 18′) and configured with heat exposure by sintering such that fibers of the fiber web (4, 4′) are burnt off and in that the ceramic material (6) is sintered together as a unitary monolithic part to form the filter body (1). At least two ceramic filter bodies (1) are provided that are separately embodied from one another and connected fluidically parallel to one another. Each filter body (1) is limited with regard to its size such that it withstands the thermal loads of the hot exhaust gas flow (2).