We consider the right to the truth an essential human right that should be recognized and guaranteed by the Law. Allowing all humans access to the truth is a human good permitting the achievement of a higher degree of human perfection and realization and, consequently, there are strong reasons to affirm that the Law should recognize and guarantee as much as possible access to the truth. Considering that it has been the international recognition of the right to the truth which has provided the basis for domestic regulations it is logical that we should focus attention on the international sphere of human rights protection and it is for this reason that we have carried out a case-law method investigation to describe the concept of "the right to the truth".