The invention relates to a thrust reverser comprising vanes for deflecting flow and a cowl (23) able to move between an open position releasing said deflecting vanes and a closed position covering said deflecting vanes (25) and furthermore comprising rails (45) able to slide in slideways (30), the rails (45) being mounted directly or indirectly on said cowl (23) and the slideways (30) being mounted directly or indirectly on either side of a suspension pylon (8) or vice versa, characterized in that it comprises at least one actuator able to slide the cowl (23) between its open and closed positions, the actuator being disposed in line with the corresponding rail (45), said actuator being: - either an actuator having a rotating nut (51) connected to an endless screw (47), for sliding the corresponding rail or corresponding slideway, as the case may be, - or an actuator suitable for pulling on the corresponding rail or on the corresponding slideway, as the case may be.