Abstract: The racket-stringing machine comprises a cradle for locking a racket frame in position and means for applying tension to a racket string. In order to apply tension to the string which is attached to the racket frame, a carriage is located externally of the cradle and provided with means for anchoring the string, for guiding and displacing the carriage in translational motion in the direction of withdrawal or approach with respect to the cradle and for applying tension to the string. The instantaneous tension of the string is compared at each instant with a predetermined tension to be established in order to permit displacement of the carriage in the direction of withdrawal as long as the instantaneous tension is lower than the predetermined tension, the carriage being then locked in position when these tensions are of equal value.