To date, no scientific literature on the issue of religion in prison has been published in Muslim countries. There, religious practice in prison does not seem to have received specific normative attention. The new political context after the so called “Arab Spring” has given new importance to religion in the space of state institutions. Under the pressure of security concerns, we are witnessing the emergence of new forms of religious intervention in prisons. On the basis of a multi-year research project in Europe, which was recently extended to the context of Muslim-majority countries, this article intends to take stock of the reality of the case of Tunisia, where the essential elements of this theme intersect, by calling on initiatives of state institutions, but also the development that has taken place in civil society.