The invention relates to a security and/or valuable document, particularly a banknote. The security and/or valuable document comprises a support (1) made of a paper material and comprises an, in particular, strip-like or thread-like film element (2) containing one or more optical antifalsification features. The support (1) has one or more window-shaped openings (35) closed by means of the film element (2) that overlaps the openings on all sides. A sealing layer (4), which covers the surfaces of the film element (2) at least in the area of the openings, is applied to the side of the paper material support (1) situated opposite the film element (2). |