Legal forms and contents have been affected by two phenomena. These are Postmodernism and Law's Constitutionalization. Emerged at the same time, both also influence in the creation of State's and Para-state's laws. Therefore, this article aims to explore their influence in the creation of Colombian electoral law as it is today. On this regard, first I will explore the notion of Postmodernity -as criticism of Modernity - base on Vattimo and Lyotard. Then I will address Law's Constitutionalization as a phenomenon. Then, it would be explained the Constitutionalization of Colombian Electoral Law, especially since the 1991 Constitution, remarking its postmodern elements.