The professional identity of social workers is a source of various issues within the profession, even causing an identity crisis in a significant number of professionals (Franssen, 2000). Referents on which social workers’ professional identity is based allow to learn about their professionalism. It is in this perspective that researchers from l’Équipe de recherche et d’analyse des pratiques professionelles (ERAPP) conducted a study aiming to identify the referents on which social workers support themselves to define their profession. Interviewed social workers resort to the concept of help to define their profession. Then, a modeling of the conceptions of this notion is proposed. Issues relating to these designs are discussed.