Abstract: Swing window arrangement equipped with a child safety device and having a pair of pivot mountings (12) which are each provided with a frame fastening plate (13) which supports, about a first pivot pin (15), a first, upper pivot arm (16) and, about a second, lower pivot pin (17), a second, lower pivot arm (18), at a certain distance from each other. The child safety device is only arranged on the one pivot mounting. A first component (23) of the child safety device, which forms a weight-loaded drop bolt, is arranged axially moveable on the frame fastening plate (13). A second component (24) of the child safety device, which is provided with a stop forming hook (24a), is fastened to the lower pivot arm (18) in order to be swung together with the latter and by this means is moved inwards into and outwards from a locking engagement with the first component (23).