The present work moves forward in the perspective of demonstrating that during the penal (phase policeman and judicial phase) persecution, imputed should be treated always as innocent (innocence state), should stay in freedom, being the protective custody only admitted in cases absolutely exceptional, and since the same has function of instrumental precautionary measure. That research doesn't have the pretension of exhausting the theme, but, to bring the discussion some subjects that are in the order of the day, usually when we speak of protective custody for warranty of the order it publishes, once the extreme measure ordained under such a foundation doesn't present characteristics of instrumental measure. It is intended, therefore, beginning, to demonstrate the existent collision between constitutional principles of the innocence presumption and the announcement of the protective custody for warranty of the public order. In a second plan, there is an objective to demonstrate the unconstitutionality of the exception measure ordained in the terms above referred and road of consequence, the offenses that can occur to the fundamental human rights and the ends proposed by one Democratic state of Right, when ordinate.