The invention concerns a splice bar for connecting two abutting sections of said cable tray, each cable tray section comprising longitudinal warp yarns and transverse weft yarns connecting the warp yarns. It comprises: an elongated central part (2) having two transverse support zones (18), designed each to receive one weft yarn; two anvil lugs (4) connected to the central part (2) on the same side thereof and arranged on either side of the transverse support zones (18); and two locking lugs (6) connected to the central part (2) on the side opposite to the anvil lugs (4) and arranged on either side of the transverse support zones (18).