Abstract: A civil safety barrier (10) including individual elements (12, 13, 14, 15) intended to be arranged horizontally one after the other, each of which includes at least one link (12A, 12B, 13A, 13B, 14A, 14B, 15A, 15B) made up vertically of a bottom frame and of a top frame (22), characterized in that at least one axial hinge element (32) that is the to be “dismantlable” is interposed between two adjacent edges of the frames which allows the second frame (22) to be fitted perpendicularly to the first (18) and then the second frame (22) to be pivoted to bring it back coplanar with the first.