The family, considered the basic element of the social system, plays an extremely crucial role in the proper functioning of a given nation. By fulfilling a number of important functions for society and individuals, it directly affects the demographic growth and the financial and political condition of the state. As part of this expertise, Dr. Ilona Grądzka reconstructs the meaning of the family institution. The aforementioned reconstruction is carried out on the basis of the jurisprudence of the Constitutional Tribunal.