Air filter device with filter element

The air-filter device has an air flow path (9) that is laterally enclosed in wall (8) of housing (7) and is provided an insert aperture (10) through which a filter element (1) is removably inserted into housing. A closure region (12) is cooperated with the aperture in inserted state of filter portion (2). A collar (15) of housing wall is projected outwards and extended on one side of aperture along opening edge (13). A bar (14) is adjoined to filter frame (4) of closure region in inserted state of filter portion and is bounded with frame portion (16) against the sides of collar.