A device for filtering polluted air, in particular for filtering the polluted air into or out of enamelling lines (painting installations), with a housing which is provided with a feed area for the polluted air, with a discharge area for cleaned air separated from the feed area, with at least one opening accessible from the outside and with at least one cylindrical holding device for at least two filter arrangements, wherein each filter arrangement comprises at least one filter, the holding device releasably holds the filters provided in the at least two filter arrangements (6, 6a to 6e) via holding elements arranged thereon, and the holding device is movable between a first operating position and a second operating position and vice versa thereto by rotation, wherein in the first operating position of the holding device the contaminated air flows through the filters of the at least two filter arrangements (6, 6a to 6e) and wherein in the second operating position of the holding device the contaminated air flows through the at least one filter of the at least one filter arrangement (6a to 6e), while at the same time the at least one filter, loaded with filtered impurities, of the at least one other filter arrangement can be removed through the at least one opening in the housing, which is accessible from the outside, and can be replaced by at least one filter not loaded with filtered impurities, characterised a) in that the wall of the cylindrical holding device is formed by an inner hollow cylinder and an outer hollow cylinder being arranged at an equal distance therefrom, b) in that the radial distance between the two hollow cylinders (35, 36) is matched to the length of the respective filter in such a way that the filters are held by the annular space formed between the two hollow cylinders (35, 36), c) in that the annular space has holding elements for identically designed filters which are distributed evenly over its circumference, d) in that each filter is provided with an air passage opening on the end face in each case to the inner and outer hollow cylinder and the air passage openings are aligned with the openings provided in the casing of the inner and outer hollow cylinder, and e) in that the cleaned air is drawn off at the foot end via the inner hollow cylinder closed at the head end or at the head end via the inner hollow cylinder closed at the foot end via a suction fan producing a slight suction when changing the loaded filter at least in the region of the opening of the housing. a) in that the wall of the cylindrical holding device is formed by an inner hollow cylinder and an outer hollow cylinder being arranged at an equal distance therefrom, b) in that the radial distance between the two hollow cylinders (35, 36) is matched to the length of the respective filter in such a way that the filters are held by the annular space formed between the two hollow cylinders (35, 36), c) in that the annular space has holding elements for identically designed filters which are distributed evenly over its circumference, d) in that each filter is provided with an air passage opening on the end face in each case to the inner and outer hollow cylinder and the air passage openings are aligned with the openings provided in the casing of the inner and outer hollow cylinder, and e) in that the cleaned air is drawn off at the foot end via the inner hollow cylinder closed at the head end or at the head end via the inner hollow cylinder closed at the foot end via a suction fan producing a slight suction when changing the loaded filter at least in the region of the opening of the housing.