EN
The purpose of this paper is to analyze the personal maturity significance for the relation between the daughter-in-law and the parents-in-law. The analysis allows us to show what criteria a good daughter-in-law should fulfill. The author applies the analytic-synthetic method to analyze the available literature. The work resolves to investigate the relations between the children-in-law and the parents-in-law as these relations are essential for the intergenerational family’s functioning. As a framework for the research, the author uses the Zdzisław Chlewiński’s personal maturity theory (1991), which emphasizes the significance of constant self-improvement. Chlewiński specifies three criteria for personal maturity: having a personal attitude towards the other man, autonomy, and an insight into oneself. Research results: the more the daughter-in-law is characterized by her personal attitudes towards other people, her own autonomy, and her good insight into herself, the better and more mature she will be, and the more she will contribute to the good relations within an intergenerational family.