Air filter device, in particular for a vehicle, - having a disc-shaped filter element with a filter body and filter frames adjacent to the filter body on at least one side, - having a housing, the side of the housing wall of which borders an air flow pathway and has an insertion opening through which the filter element can be placed in the housing and removed from said housing, - whereby during use the filter frame interacts with an opening edge which borders the insertion opening to close the insertion opening in a locking area which is adjacent to the side of the insertion opening which faces the filter body, - whereby the filter frames have at least one laterally attached bar in the locking area, - whereby the bar has geometrically larger dimensions than the insertion opening, - whereby the bar has elastically deformable areas which lie very closely to the housing, - whereby the opening edge has at least one collar which protrudes outwards from the housing wall and extends on at least one side of the insertion opening along the opening edge, - whereby the bar is bent outwards during use by a frame section of the locking area which is adjacent to the filter body, characterised in that - the bar lies flat on the side of the collar, - and in that at least one snap-in latch, the sides of which are elastically adjustable and which has at least one snap-in contour, is formed on the collar, said snap-in latch engaging behind a counter snap-in contour formed on the bar - and in that the counter snap-in contour is either formed by a free end of the bent bar or is formed by an edge of a snap-in opening which penetrates the bar. - having a disc-shaped filter element with a filter body and filter frames adjacent to the filter body on at least one side, - having a housing, the side of the housing wall of which borders an air flow pathway and has an insertion opening through which the filter element can be placed in the housing and removed from said housing, - whereby during use the filter frame interacts with an opening edge which borders the insertion opening to close the insertion opening in a locking area which is adjacent to the side of the insertion opening which faces the filter body, - whereby the filter frames have at least one laterally attached bar in the locking area, - whereby the bar has geometrically larger dimensions than the insertion opening, - whereby the bar has elastically deformable areas which lie very closely to the housing, - whereby the opening edge has at least one collar which protrudes outwards from the housing wall and extends on at least one side of the insertion opening along the opening edge, - whereby the bar is bent outwards during use by a frame section of the locking area which is adjacent to the filter body, - the bar lies flat on the side of the collar, - and in that at least one snap-in latch, the sides of which are elastically adjustable and which has at least one snap-in contour, is formed on the collar, said snap-in latch engaging behind a counter snap-in contour formed on the bar - and in that the counter snap-in contour is either formed by a free end of the bent bar or is formed by an edge of a snap-in opening which penetrates the bar.