Screen connection device for hinging screens together (1a, 1b), having the following features: - the screen connection device has a first and second hinge element (4a, 4b) and a pivot pin for hinging the first and second hinge element (4a, 4b) together, the pivot pin forming a pivot axis for the screens (1a, 1b), - the first and second hinge element (4a, 4b) each have a fastening portion for being fastened to a screen (1a, 1b), the fastening portion having a central axis which can be arranged in or parallel to a main plane of the screen (1a, 1b), - the first and second hinge element (4a, 4b) have complementary locking surfaces (19, 24) which can be brought into locking engagement with one another so as to lock the first and second hinge element (4a, 4b) in at least one angular position with respect to one other, - at least one of the first and second hinge elements (4a, 4b) has an elongate hole (25a, 25b) through which the pivot pin extends, - the elongate hole (25a, 25b) extends at least partially in an arc, obliquely or transversely to the central axis of the fastening portion, - by moving at least one of the hinge elements (4a, 4b) relative to the pivot pin, the locking engagement between the first and second hinge element 4a, 4b can be released, thus allowing the hinge elements (4a, 4b) to be pivoted relative to one another, - each of the first and second hinge elements (4a, 4b) has a first locking surface and a second locking surface, characterised in that the first locking surface is formed on an intermediate portion adjacent to the fastening portion and the second locking surface is formed on an end portion of the hinge element (4a, 4b), which portion projects beyond the first locking surface, the second locking surface of the second hinge element being complementary to the first locking surface of the first hinge element and it being possible to bring said second locking surface into locking engagement with the first locking surface of the first hinge element in at least one angular position of the hinge elements (4a, 4b) such that the first and second hinge element (4a, 4b) can be brought into locking engagement with one another by means of two mutually spaced locking connections. - the screen connection device has a first and second hinge element (4a, 4b) and a pivot pin for hinging the first and second hinge element (4a, 4b) together, the pivot pin forming a pivot axis for the screens (1a, 1b), - the first and second hinge element (4a, 4b) each have a fastening portion for being fastened to a screen (1a, 1b), the fastening portion having a central axis which can be arranged in or parallel to a main plane of the screen (1a, 1b), - the first and second hinge element (4a, 4b) have complementary locking surfaces (19, 24) which can be brought into locking engagement with one another so as to lock the first and second hinge element (4a, 4b) in at least one angular position with respect to one other, - at least one of the first and second hinge elements (4a, 4b) has an elongate hole (25a, 25b) through which the pivot pin extends, - the elongate hole (25a, 25b) extends at least partially in an arc, obliquely or transversely to the central axis of the fastening portion, - by moving at least one of the hinge elements (4a, 4b) relative to the pivot pin, the locking engagement between the first and second hinge element 4a, 4b can be released, thus allowing the hinge elements (4a, 4b) to be pivoted relative to one another, - each of the first and second hinge elements (4a, 4b) has a first locking surface and a second locking surface,