The present invention relates to a ball joint, associable with a first and a second component for their connection in an adjustable position, including a spherical element, at least partially housable in a hollow housing seat of said first component, an insert, connected to such a spherical element and removably associable with such a second component, wherein the spherical element includes a substantially cylindrical central portion, interposed between two substantially spherical cap shaped portions arranged with respect to one another so that each circular base of each substantially spherical cap shaped portion matches a respective base of such a substantially cylindrical portion.