If Islam is given a privileged status in most constitutions of the Arab world, religious references coexist alongside other provisions, drawn from the concept of Western constitutionalism. This chapter examines the different forms of constitutional consecration of religion in the constitutions of the Arab world and claims that their impact on the political and legal orders of these countries remains under the close supervision of the secular elites. The inclusion of Islam as the religion of the State into the constitution therefore is as much a way to take into account the religious values of the majority of the population as a political motivation to strengthen the religious and political legitimacy of the rulers. It is therefore the wayfor politics to interfere into the religious sphere more than for religion to interfere into politics.