Abstract: A device for assembling sash elements (12) in a frame (11) disposes over instruments (8) for clamping the frame (11). An angle template (7) is provided for inserting the sash element (12) which is freely movable on a predefined plane in relation to the clamped frame (11). The sash element can be held fast and be pushed into the desired assembly position at a set angle on the angle template.