The invention relates to a cable clamping device, for example for an electrical connector, comprising at least one bushing and a clamping ring. The bushing and the clamping ring both comprise an opening for the passage of a cable. A bushing has a number of bushing portions which, joined together, form a sleeve about the cable. Two flanges bear the bushing portions and are articulated to a casing so as to pivot between an unclamped position of each bushing, in which the cable can be moved, and a clamped position, in which each bushing is kept clamped to the cable by the clamping ring. Locking means keep the clamping ring in the position in which the cable is clamped by the bushing.