Abstract: The present invention refers to improvements in contact filling for cooling towers, of the type comprising prismatic triangular bars (1) made of plastic material and arranged in multiple parallel horizontal layers, one lateral plan face thereof being turned upwards, the improvements comprising a support structure having the shape of a vertical grill (2) with lozenge-shaped meshes, said support structure intended to provide stable support to said bars (1) which are stably seated by their peaks and flanks, each of said bars (1) further including an inner longitudinal edge extending in one or in a pair of longitudinal rectilinear rules (3), whose completely free edge is cut in transversal teeth (4) having negative hollow intended to obtain attachment over the grill seats (2), as well as to impede formation of liquid grooves or beads along the rules (3).