Abstract: A document scanner comprises a housing in which a document scanning device is arranged. The housing comprises a scanning aperture for a scanning area of the scanning device. The scanning aperture is surrounded by a receiving area of the housing for a transparent support plate. The support plate covers the scanning aperture and serves as a support for a document to be scanned. A polymer seal surrounding the scanning aperture is arranged between the support plate and the receiving area. The document scanner is dust-and splash-proof and is therefore suitable for outdoor use.