A loom for triaxial fabric comprising: - an assembly in charge of feeding warp yarns, aligned in parallel to an X direction, which arranges them on two surfaces separated from each other; - an assembly in charge of moving forward the warp yarns according to said X direction; - an assembly in charge of inserting an oblique fixed weft yarn, which progressively forms the oblique fixed weft between said two surfaces of the warp yarns, by alternating insertion and retraction, i.e. by boustrophedonically arranging said yarn along an Y direction that is oblique with respect to said X direction, while simultaneously making the just formed oblique weft move forward parallel to X direction; - an assembly in charge of inserting an inserted oblique weft yarn along a weaving front F, the latter being oblique both with respect to the X direction and with respect to the Y direction according to which the oblique fixed weft is inserted; said assembly operating in coordination with said assembly in charge of inserting the oblique fixed weft; characterized in that it comprises a plurality of guide elements for the warp yarns, whose yarn input ends are aligned along the terminal edges of each of said two surfaces of the warp yarns whereas the yarn output ends are aligned parallel to said weaving front F and downstream of the latter, so as to contribute to keep the warp yarns spaced from each other to make it possible to place the oblique fixedweft internally to the two groups of warp yarns before said inserted oblique weft yarn is laid, and in that said guide elements are shaped in such a way as to present a convex profile on the part facing the weaving front F, said guide elements being mounted in such a way that said convex profile faces upwards or downwards, so that the guide elements lower and rise the warp yarn moving on the outer part of said profile respectively, by also displacing the oblique fixed weft already located between the two surfaces of the warp yarns and forming a gap through which the inserted oblique weft yarn is inserted, so that said inserted oblique weft yarn crosses both the warp yarns and those of the oblique fixedweft alternatively, so as to form a triaxial fabric. - an assembly in charge of feeding warp yarns, aligned in parallel to an X direction, which arranges them on two surfaces separated from each other; - an assembly in charge of moving forward the warp yarns according to said X direction; - an assembly in charge of inserting an oblique fixed weft yarn, which progressively forms the oblique fixed weft between said two surfaces of the warp yarns, by alternating insertion and retraction, i.e. by boustrophedonically arranging said yarn along an Y direction that is oblique with respect to said X direction, while simultaneously making the just formed oblique weft move forward parallel to X direction; - an assembly in charge of inserting an inserted oblique weft yarn along a weaving front F, the latter being oblique both with respect to the X direction and with respect to the Y direction according to which the oblique fixed weft is inserted; said assembly operating in coordination with said assembly in charge of inserting the oblique fixed weft;