The article considers the ideological transformation of common belief – Old Rite wing of Russian Orthodox Church emerged as a compromise between the Old Believers and supporters Nikon reformed Church. Originating in fact, almost immediately after the schism of the XVII century and legal registration in 1800, Edinoverie presented as an example of the transformation of traditional spirituality from its own traditional through a phase of rational religion - in simulative phase. Gateway to move media "to the ancient piety" in a secular state church. The second stage - short output common belief in the confessional level, an attempt to change the paradigm of separation and the entire course of the official Church. The third stage - present - an attempt of turning common belief (as a member of the Old Believers' semantic field) in simulative element Postmodernity spirituality. Being inside the Russian Orthodox Church and the most traditionalist and traditional wing Edinoverie is an indicator of a post-religious processes affecting primarily the most traditional forms of spirituality. Therefore, exploring the history and transformation rather uniform in its semiotic dimension common belief, it is possible to obtain information about the nature of post-religious transformations taking place with the Orthodox Church as a whole. Post-religious mentality has a scene in the most saturated semiotic fields; situational neglect this saturation by new-ritualists does not allow them to go in its entirety from the religious format in post-religious Edinoverie in the Russian Orthodox Church, carefully keeping ancient rituals and rules, but at the same time deprived of its exclusivity schismatic awareness, help to consider post-religious shifts without impurities to them ideological and political factors.