ABSTRACT. This research has analyzed how the “ATICE” (Animateurs pour les Technologies de l'Information et de la Communication en Education “, teachers of the elementary schools, have tried to organize in professional groups. The analyses of their mailing-list show how they mobilize on the professional stakes of their community of pratices. The function of ATICE relies on expert knowledge, on skills essentially built on contextual experience. On the educational side, the ATICE's domain of expertise is mainly technical. This expertise places the ATICE in an overhanging position compared to the other actors of the field and offers another guarantee of survival to their function. MOTS-CLÉS : enseignants, technologies de l'information et de la communication, liste de diffusion, communauté en ligne, professionnalisation, formation, identité professionnelle. KEYWORDS: teachers, ICT; mailing-list, on-line community, professionalisation, formation, professional identity