The invention relates to an
air filter device for a motor vehicle, comprising a housing (12) with a receiving space (14) for a
filter element (10). The
filter element (10) has a frame (16) which at least partially surrounds a
filter material (18) of the
filter element (10). The frame (16) comprises a first side wall (20) and a second side wall (22) opposite the first side wall, and a first transverse wall and an opposite second transverse wall (32, 34) connecting the side walls. A first projection (26, 30, 76, 78) projects from the respective side wall (20, 22) near one of the two transverse walls (32, 34). The housing (12) comprises two opposite housing side walls (44, 46), each of which has at least one chute (50, 52, 80, 82, 84, 86), in which a first projection (26, 30, 76, 78) of each side wall (20, 22) of the filter element (10) can be inserted into a chute end region (54, 56, 72, 74, 98, 100, 106, 108) directed in a first direction (64, 102, 104). A second projection (28, 76, 78) protrudes from the side wall (20, 22) in the vicinity of the other of the two transverse walls (32, 34), and wherein the housing side walls (44, 46) each have a second slotted end region (72, 74, 98, 100, 106, 108) which is directed in the opposite direction to the first direction (64, 102, 104) and into which the second projection (28, 76, 78) can be inserted, such that the filter element (10) is located in the receiving space (14) of the housing (12) in the operating position thereof. The side walls (20, 22) can be elastically deformed in such a way that the mutual distance (40) between two projections (26, 28, 30, 76, 78) arranged on the same side wall (20, 22) can be reduced in order to insert the respective second projection (28, 76, 78) into the associated second chute end region (72, 74, 98, 100, 106, 108) along the inwardly directed chute guide side (68, 70, 92, 96, 90, 94) during installation. The invention also relates to a filter element (10) for such an
air filter device.