This document addresses the issue of administrative morality from its concept and its inclusion as a principle of public function within the 1991 Constitution, applicable to public procurement, especially in the pre-contractual stage from which it fixes the need, parameters and requirements for future hiring. Hence the requirement of a transparent, direct and orderly behavior of the public servant, who administers the resources of the state for public purposes, in which this work is found, which prevents the principle of administrative morality from being permeated by the corruption that it entails. Detrimental consequences for society and the state.