The invention relates to a filter device for fluids, comprising a filter housingdefining a longitudinal axis. Said filter housing comprises housing connections and can accommodate a filter element. The fluid can, during filtering, flow through a filter medium surrounding an inner filter cavity, and the filter element is enclosed by an end cap on its lower end facing the bottom part of the filter housing. Said end cap comprises a passage forming a fluid connection to the inner filter cavity and can be fixed to an element retainer of the filter housing. The element retainer comprises retaining piece on the bottom part of the filter housing, said retaining piece being open towards the filter element and a fluid channel leading to a housing connection running into it. The end cap of the filter element comprises a connecting piece which can be accommodated in the retaining piece and can be secured therein to a supporting zone. The retaining piece forms an opening which forms a fluid connection to the fluid channel leading to the element retainer and comprises a sealing arrangement which seals the opening from the open end of the retaining piece.