This 19th edition of HesaMag, the ETUI magazine on health and safety at work, focuses on working conditions behind bars. To work in prison is to work on the margins of society. To work as a prisoner and to work with prisoners is a very ordinary job in terms of the actual actions and tasks being performed. But the context in which the work is being performed is radically different to the “outside” world. This issue is rarely addressed in occupational health.