The aim of this article is to explain educational reproduction in the Czech Lands between 1906 and 2003 from the perspective of educational mobility. Mobility trends in the intergenerational transmission of educational status identified in an analysis are presented in the context of findings on odds ratios in education and in a historical context. The analysis is based on observations of the intergenerational transmission of educational status, i.e. educational mobility, in two educational transitions between three educational levels (lower secondary, upper secondary, and higher education). Mobility tables and their log-linear analysis are used to help explain what mobility processes shape the educational inequalities that have proved stable over the long term and also odds ratios between the main levels of education. The article helps fill in the gap in knowledge about the long-term development of the educational structure in the historical Czech Lands and Czechoslovakia and provides information about typical mobility trajectories and varying mobility patterns in periods before 1948, between 1948 and 1989, and after 1989. An understanding of these structural contexts helps clarify what occurred in the past and what is occurring now in the area of unequal access to education and to explain one of the main findings from the analysis - that in Czech society the transmission of a family's educational status from one generation to the next continuously follows the same patterns.