The guarantee of the offended child´s right to give testimony in a penal suit is investigated. The issue focuses on the acknowledgement of the child´s hearing as a right and not as a duty. The supposition is based on Brazilian law, international law and in the res judicata of the jurisdictional organ of the Inter-American System for the Protection of Human Rights. Since it is a right, the violation of such a warrant triggers international mechanisms of protection for the effects of the personality´s rights written in the Inter-American Convention of Human Rights (San Jose da Costa Rica Pact). Discussions employ the deductive method and bibliographical, documental and jurisprudential research.