The process for manufacturing a timepiece component (10) including at least one fastening element (12), includes positioning at least one fastening element (12) within a manufacturing mould (20) by means of at least one guide element (25; 35), filling the manufacturing mould (20) with a material so as to overmould, i.e. at least partially envelop and set, the at least one fastening element (12) in the material, and removing the timepiece component (10) from the manufacturing mould (20), this timepiece component (10) being at least partly formed by the material and the at least one fastening element (12).