This article addresses the relationship between the principle of transparency and deliberative democracy in the field of public administration. In a first part, the different notions of legitimacy and the convenience o f a p p l y i n g t h e p r i n c i p l e s of transparency and deliberative democratization to the administrative functions are exposed. In this regard, it will be argued that the principle of transparency constitutes one of the prerequisite for a deliberative conception of democracy and public administration. In a second part, on the light of this theoretical framework, the procedure of previous and public consultation for administrative rulemaking created by article 8.8 of the CPACA and regulated by Decree 270 of 2017 will be analyzed. It will be argued that the existing regulation of this procedure left some gaps that might be filled with some systematic interpretations to guarantee it democratic and deliberative effectiveness.&nbsp