Abstract: Weaving loom blade crossbeam that comprises two edge areas separated one from the other by a median area, with one of the edge areas strengthened in the longitudinal direction of the crossbeam by a material that contains an armature of fibers, and with the other edge area carrying a warp catch bar and displaying, possibly, one slit, at least. When the median area forms one whole with the aforesaid other edge area and is therefore made, partially at least, of the same metal as part, at least, of this other edge area, this median area comprises a plate or metal frame, whereas, when the median area consists of a part separate from this other edge area and fitted to the latter by glueing or moulding, this median area is formed essentially by a material strengthened by fibres.