Abstract: Present invention relates to a closing device, particularly for jewels and like, comprising a main body and at least a hook, hinged each other with said at least a hook movable about a hinging axis, opposed and by the action of first elastic means provided between said main body and said at least a hook, respectively, at least between a closure configuration, wherein a free end of said at least a hook is in contact with an abutment surface defined by said main body, and an opening configuration, wherein said free end is far from said abutment surface, to permit insertion of said at least one hook within a ring body, and vice versa, said device being characterized in that it comprises blocking means in at least one of said configurations, said blocking means comprising, for each one of said at least one hook, at least two grooves, respectively obtained on a lateral surface of said at least one hook, and at least a pawl, sliding housed within a sliding seat, obtained in said main body, along an interception dir