A device for closing a building opening, wherein a planar closure element and/or a frame rigidly attached to the edge of the building opening has a frame profile, which by way of two lateral surfaces delimits a profile cavity that is open toward the rebate face, wherein from each of the two lateral surfaces, a profile wall projects toward the direction of the respective other lateral surface. On the projecting profile walls, a metal cover plate and a clamping part are attached such that they are pulled together by screws, with the interposition of the profile walls. On the two projecting profile walls, a clamping part abuts, in each case, both flanks of a groove, the opening surface of which is parallel to the connecting surface between the two projecting profile walls.