The author seeks to demonstrate the hidden connection that exists between balancing and the living constitution. In this respect, accepting balancing as a mechanism of constitutional adjudication assumes the need to conceptualize the Constitution as a living instrument. In effect, balancing requires a model of Constitution flexible and moldable, standard that the living constitution precisely promotes. The article demonstrates this connection by describing the experience of American constitutionalism at the end of the XIX century and the beginning of the XX century. Finally, the author points out the tensions that the binomial balancing-living constitution introduces within the traditional framework of constitutionalism.