Poster frame that makes it possible to change a poster and which, in order to create a rectangular frame, comprises four frame profile sections connected at the corners of the frame. One (7) of these frame profile sections can be moved in relation to the other three (8). The two corners at the ends of the movable frame profile (7) comprise an angled corner piece (10), one arm (9) of which is telescopically movable in the respective adjacent fixed frame profile (8), so that the movable frame profile (7) can be moved between an inner closed position of the frame (3) and an outer end position in which the frame is open and a poster can be inserted into and taken out of grooves in the fixed frame profiles (8).