Abstract: The present finding relates to a system for fixing panels consisting of are welded bars to support poles, particularly but not exclusively for fencings, wherein into said poles there is obtained at least one thorough hole (20) comprising a screw (15) having a threaded stem (16) crossed centrally and for its entire length by a longitudinal thorough slit (19), and a nut (18) intended to screw on said threaded stem, said slit being intended to receive the bars of two adjacent panels.