The invention relates to a worm gear (4) for a worm gear mechanism (1) of a motor vehicle steering system comprising a carrier body (40) and a multiplicity of teeth (42) with tooth surfaces (420), wherein the teeth (42) point radially to the outside, wherein the carrier body (40) is formed from a plastic which contains reinforcing fibres (51), and has a multiplicity of ribs (43) with rib surfaces (430) which point radially to the outside from a central circumferential annular web (44) of the worm gear (4), and wherein the teeth (42) are applied to the ribs (43) of the carrier body (40) using the injection moulding method, and wherein the reinforcing fibres (51) are oriented, wherein the orientation of the plurality of reinforcing fibres (51) follows that of the adjoining rib surfaces (430) of the carrier body and/or the adjoining tooth surfaces (420) of the teeth (42).