The present article analyze the role executed by the Public Improvement Association and the Police Code of 1931, of being the main promoters of healthiness and hygiene in Barranquilla (Colombia) in the mid of the xx Century. This works shows how by means of regulations and Institutions it was possible to taught the citizens of Barranquilla to follow an hygiene and healthiness habit, in order to build a civilized and modern model city, following the mentality of that period of time.