Changes in the perception of the family have resulted in recognizing the role of the father, not only as the family’s provider, but also as a full participant in the children’s upbringing. The aim of this thesis is to explore the inclusion of fathers in young children's upbringing. The research has also sought to determine to what extent and in which activities fathers participate. An empirical study has been conducted in order to determine whether there is an estimate difference of the fathers’ involvement in activities with young children with regard to sex, age, education and the number of children in the family. The participants of the study are 1520 parents. For the purposes of the research, the participants have completed the questionnaire “The assessment of fathers' involvement in the upbringing of young children“ It consists of two parts. The first part refers to the participants’ socio-demographic data, while the second part refers to the involvement of fathers in the upbringing of young children. The participants have estimated the father’s inclusion in activities with the youngest child in the family, and they have evaluated their answers on a four-point Likert scale. The results of this research have shown that there are statistically significant differences in the evaluation of fathers' involvement in the upbringing of young children with regard to sex, age, education and the number of children in the family.