Abstract: A locking slider for a slide fastener is made entirely of plastics material and comprises a slider body with a springable locking means and a pull tab fastened at a bow of the slider body, the slider body being an integral unit consisting of a lower and an upper slider plate connected by a connecting separator. The upper slider plate comprises a V-shaped bearing for receiving a fastening eyelet at one end of a pull tab. The bow, extending over the bearing, is integrally formed with the locking means and is provided with a fastening pin, which is snapped into a hole in the connecting separator.The end of said bow provided with locking means is formed as elbow reaching around the free end of the upper slider plate and ending into an upwardly directed barb engaging an opening at the upper slider plate.The slider as well as the interlocking members of the slide fastener can be produced with the same material having a uniform color.