The scientific basis of the supremacy of the Constitution is an important issue of the practice and theory of constitutionality. This preoccupation is related to the role of the Constitution in the normative system, in the hierarchization of the norms, as well as to the place of the constitutional law in the legal system. The supremacy of Constitution has as main consequence the compliance of entire law with the constitutional norms. Guaranteeing of the observance of this principle is essential for the rule of law, is primarily an attribute of the Constitutional Court of Romania, but also an obligation of the legislator to receive by texts adopted, within its content and form, the constitutional norms.