This article makes a comparative analysis of the regulation of religious freedom in Chile and Peru. Although each of these countries has had its own historical evolution, currently both of them protect this fundamental right and, one way or another, provide mechanisms for collaboration between the State and religious denominations. The author notes that some European countries have developed a bilateral law which intends to combine the secular state with the recognition of the vitality of religion as a social factor. In his view, the existence of increasingly diverse and intercultural societies demand more flexible laws and states that guarantee the protection of civil rights and civil liberties.