The present invention relates to a filter device (1), in particular an oil filter, having a filter housing cover (2) which delimits a receiving chamber (5) and in which is arranged an annular filter element (6), having a housing (4) in which a dome (15) is arranged centrally and to which the filter housing cover (2) is screwed, having at least one intermediate piece (3) which is arranged between the filter housing cover (2) and the housing (4) when the filter housing cover (2) is screwed to the housing (4), having a housing-side inlet duct (7) which communicates with an untreated side of the annular filter element (6), and a housing-side outlet duct (8) which communicates with a clean side of the annular filter element (6), having a housing-side drainage duct (9) through which the receiving chamber (5) can be drained during the removal of the filter housing cover (2), having a closure device (11) which is arranged in the intermediate piece (3) so as to be rotatable about the filter axis (10) and which has a closure element (12) by means of which the drainage duct (9) can be closed off.