A connecting-separating device is for separating satellites from launchers or satellite dispensers. Circumferentially aligned clamps can be coupled on their inner face on rings of separable elements constituting the union interface between the two separable elements. A release mechanism connects two of the clamps through one of the ends of the clamps. The two clamps are connected by the release mechanism include a protrusion protruding from their outer faces at the end opposite the end connecting with the release mechanism. The rest of the clamps include a protrusion protruding from their outer faces at each of their ends adjacent the adjacent clamps, so that each pair of clamps adjacent and not connected to one another by the release mechanism are connected to one another by connectors connecting the protrusions.