A filter element, in particular an air filter element for a fresh air system of an internal combustion engine, - with a first plate filter body made of pleated filter material, - with a separate second plate filter body made of pleated filter material lying opposite the first plate filter body, - with a first wall body made of plastic, which is rigidly and tightly connected to a first transverse end of the first plate filter body and to a first transverse end of the second plate filter body, - with a second wall body made of plastic, lying opposite the first wall body, which second wall body is rigidly and tightly connected to a second transverse end of the first plate filter body and to a second transverse end of the second plate filter body, - with a first end body made of plastic, which is rigidly and tightly connected to a first longitudinal end of the first plate filter body and to a first longitudinal end of the second plate filter body, - with a second end body made of plastic, lying opposite the first end body, which second end body is rigidly and tightly connected to a second longitudinal end of the first plate filter body and to a second longitudinal end of the second plate filter body, - wherein at least one of the end bodies (11, 12) has a gas passage opening, - wherein the two plate filter bodies (2, 3) are of different size in their transverse direction, - wherein at least one of the wall bodies (5, 6) between the two plate filter bodies (2, 3) in profile transversely to the longitudinal direction of the plate filter bodies (2, 3) has a curvature, characterized in that - the curvature is oriented into an interior space of the filter element, - the filter material of the two plate filter bodies (2, 3) is folded in the transverse direction of the respective plate filter body (2, 3), so that end folds of the respective plate filter body (2, 3) are situated at the longitudinal ends (13, 14, 15, 16) of the respective plate filter body (2, 3) and are rigidly and tightly connected to the respective end body (11, 12). - with a first plate filter body made of pleated filter material, - with a separate second plate filter body made of pleated filter material lying opposite the first plate filter body, - with a first wall body made of plastic, which is rigidly and tightly connected to a first transverse end of the first plate filter body and to a first transverse end of the second plate filter body, - with a second wall body made of plastic, lying opposite the first wall body, which second wall body is rigidly and tightly connected to a second transverse end of the first plate filter body and to a second transverse end of the second plate filter body, - with a first end body made of plastic, which is rigidly and tightly connected to a first longitudinal end of the first plate filter body and to a first longitudinal end of the second plate filter body, - with a second end body made of plastic, lying opposite the first end body, which second end body is rigidly and tightly connected to a second longitudinal end of the first plate filter body and to a second longitudinal end of the second plate filter body, - wherein at least one of the end bodies (11, 12) has a gas passage opening, - wherein the two plate filter bodies (2, 3) are of different size in their transverse direction, - wherein at least one of the wall bodies (5, 6) between the two plate filter bodies (2, 3) in profile transversely to the longitudinal direction of the plate filter bodies (2, 3) has a curvature, - the curvature is oriented into an interior space of the filter element, - the filter material of the two plate filter bodies (2, 3) is folded in the transverse direction of the respective plate filter body (2, 3), so that end folds of the respective plate filter body (2, 3) are situated at the longitudinal ends (13, 14, 15, 16) of the respective plate filter body (2, 3) and are rigidly and tightly connected to the respective end body (11, 12).