The article presents an analysis of the practices of conversion to Orthodoxy of the age cohort of 70+ in the context of the "deferred conversion" model. The degree of elaboration of the problem in modern Russian sociological discourse is described. The author's defi nition of the treatment process is proposed. The theoretical and methodological foundations of the analysis of the process of conversion to Orthodoxy are indicated, including: an interdisciplinary approach; an integrative paradigm in the sociology of religious conversion (religious conversion); a generational approach. The description of a qualitative sociological study of the peculiarities of conversion to Orthodoxy of the age cohort of 70+ is presented. The purpose of the study is to identify the structural components and meaningful characteristics of the process of conversion to Orthodoxy of the age cohort of 70+. It is noted that within the framework of the study, empirical data was collected using the biographical method, the sample was built using the "snowball" method, the survey of respondents was conducted using semi-structured biographical interviews. The subjects of the study were parishioners of urban and rural Orthodox churches (n = 23) – people born in the 1920s (n = 4), 1930s (n = 7), 1940s (n = 12). On the basis of the results of the study, the general description of the cases of "delayed conversion" to Orthodoxy of the age cohort of 70+ is proposed. The practices of conversion to Orthodoxy of this social group are described: mastered in the parental family; reproduced during the period of suspension of the development of Orthodox identity; intensifying the process of conversion in old age.