Connecting hook for joining elements of snow chains

A connecting hook (10) for joining elements of snow chains, comprising a first end part (11) destined to engage in at least one link (15) of a chain portion (5) creating the friction on the tread and a second end part (13) destined to engage in a part of a ring element (3, 4) which is disposed on an outer or inner side of a tyre (2), the second end part (13) of the hook (10) having a lesser thickness than that of the first end part (11).