The relationship between International Human Rights Law and municipal law in Brazil has taken a new turn with the adoption of a new Constitution in 1988. Human Rights lawyers and law teachers support the idea that the new Constitutional Charter allow for a monistic approach to the relationship between International Human Rights Law and municipal law. The present dissertation contends that even in the case of a Human Rights treaty the Brazilian Constitution demands an act destined to transform International Law in domestic law. Contrary to what these Human Rights advocates and theorists believe, the dualist theory allows, not only for the International Human Rights Law to be adopted in Brazil as material Constitutional Law, but for its prompt adoption after the entry in force of any human rights treaty ratified by Brazil. Also, this dissertation contends that in those cases that the delay in transforming International Law in municipal law harms individual rights, the Judiciary branch can offer a quick and effective response.