Abstract: A connecting shackle to facilitate the release of the guide-chain that normally links a chain for naval use used in the setting of the position of ships or oil recovery platforms, including a chain linked-shaped body. The body has an open section that is closed and opened to facilitate the corresponding linking and separating between the chains, by a first piece and second piece (4 and 5) fastenable together by transversal screws (6), and the pieces (4 and 5) are provided with recesses (11-12) complementary of end extensions (3-3′) of the open section of the body (1) of the shackle.