Abstract
Information Requirement elucidation has been intensively studied in MIS field. But yet, it had not gone far away. Why? Because people looked at it in an inappropriate way. Information Requirement had been considered from a positivism point a view, as a "positive data", that is to say something that has a "real" "existence" in an user mind. We believe that the constructivism perspective explains better the nature of information requirement. Information Requirement is a construction, being constantly constructed and re-constructed by several actors being influenced by all the systems (organizations, society, etc...) in which that lived.