Gadamer s claim of a practical character involved in philosophical hermeneutics is based, to a large extent, on a rereading of Aristotle s practical philosophy - having as a main reference, the sixth book of the Nicomachean Ethics - strongly influenced by Heidegger s ontological reading of Aristotle. The reappropriation of Aristotelian concepts, mainly, of praxis and phronesis, offers the possibility of bringing to light the existence of an ethical-political implication within the center of the question of understanding. Such a question turns to be thought in terms of the happening of interpretation-application that takes place in the scope of practical life where all understanding finds itself already operative in the commerce with things in general. In this way, the relation between hermeneutics and praxis opens a scope of reflection and discussion that has, as a main objective, an engagement in favor of practical reason, in contrast with logical-scientific arguments. In this way, our aim in this work is to approach the question of praxis such as thought by Gadamer, in the light of a basic philosophical aim: his claim of universality to his ontology of understanding. For Gadamer, the thought of philosophical hermeneutics is the thought of the universal experience of mutual understanding that is inseparable from the happening of communitarian life. Such a realm is, the comprehensive as well as practical one of his philosophical hermeneutics.