The present article tackles new empirical evidence in the study of male reproductive behaviour in the Czech Republic. It builds on a previously published theoretical and methodological overview on the chosen topic. We will try to answer the following questions: (1) What is the completed male fertility level and what preferences do men have regarding family size? (2) What are the determinants of male fertility? For this purpose, we use data from an ad-hoc survey conducted in 2011 on a representative sample of men aged 40–55. The results are presented in a comparative perspective – male/female indicators. The article includes a description of the main demographic indicators of fertility with a subchapter on the measurement of fertility ideals and preferences. Further on, we present some of the covariates which determine the final level of male fertility and the ideal number of children at both individual and societal levels. Some of the findings point to the lack of data from official statistics necessary to calculate the main indicators of male fertility. However, these deficiencies are partially removed by the results obtained from the analysis run on survey data.