Several States that make part of The European Union, each one with its internal juridical law whose Constitutions guarantee their basic rights internally, require from the judge a constitutional understanding of rights even internally. The juridical production depends on constitutional levels and techniques, also gathering the judge and a legislator on a previous view and configuration of basic rights. It can also be pointed out that those different tecniques of juridical production by internal constitutional courts is a source of basic rights on European Union. Nevertheless, the internal production of basic rights, which are under the responsability of the Supreme Court of European communities and European Court of Human Rights, are limited by ensured rights at European Court of Human Rights.