The goal of this thesis was to analyze the religiosity of Czech population from the point of view of generational perspective and answer the question how does the religiosity differ considering generation pertinence in time and how important is the socialization of generations looking at relationship to religion. Data from European Values Study from years 1991, 1999 and 2008 were used for the statistical analysis and mostly indicators connected with traditional religiosity were chosen, because socialization is related to transmission of these types of beliefs and values. On the basis of analysis of chosen indicators we can say, that the pertinence to generation determines religiosity of the individuals very strongly. Though, the relationship between religiosity and generation does not have to be linear. Considerable differences were discovered in the rate of indicators of religiosity of generation born before 1945 and later. The difference between these generations, considering most of the indicators, was greatest in the year 1991. Nowadays, we find rather smaller distance between generations. Also, the proportional representation of generations in groups of believers or participants is changing. Belief in general is still connected with religion, but considering youngest generations, this relationship is softer and open. From generations born in 1970s and 1980s, only the small amount of members declares their relationship to religion, but if they do so, their belief is quiet strong. An important trend of these days is an increase of number of atheists in all generations.