The study of violence within ITEPs (Therapeutical Educative and Pedagogical Institutes) drove us to cross the discourses of youth, parents and professionals who are living and working in such institutions and therefore to reconsider the subjective experience of violence that each of these actors are describing. As such, we identify the process of stigmatization and isolation at the roots of this feeling of violence which is founded in the medical labelling which occurs in these institutions and the powerless situation in which professionals are operating.