Sociology is on an equality with other social sciences in the fact that the object of each, of them is an aspect of social phenomena. Sociology, howeyer, has a more fundamental character than the other social sciences, because sociology has for its field the social relationships. The unique feature of sociology will be clearly shown in the point that the elemental facts treated by sociology are different in quality from those treated by other social sciences. For instance, the fundamental elements treated in the field of economics are commodity, labour, capital etc. However, in this case, these elements are treated objectively as only "things" and are generalized and united into scientific order, while their meanings as the expression of social relationships are neglected. On the other hand, the fundamental elgments in social relations which are to be treated by sociology are social groups, habits, institutions, ideologies etc. Each of these is an expression of social relationship. Therefore, it is not only a "thing" but an expression of the ways of human existence and involves subjectivity. Of course, we must always study sociology following the elemental facts themselves, and consequently we must take the empirical method to do so. But, if the last and the most difficult problems of sociology are lying in the synthetical grasp of concrete correlation of many facts, the study of these facts must be completed by the study of essential correlation. In this point, there exists the necessity of an ontological study which proceeds from the study of phenomenon to the question of existence. This essay is an ontological itudy of the family, as a part of philosophical anthropology; that is, the social ontology man himself, and not that in the relationships of men. In studying the existence of the famitly, I preferred the scientific, especially sociological way. I first introduced concepts of the family written by some sociologists, and believe that these concepts contain some truths regarding the being of the family, but, the incompleteness of the truths is to be completed by further ,study of the essential correlation in their beings. But, here we are confronted by the gap which exists between the scope of the study of phenomena and that of the ontological study. As a mediator for this gap, I preferred the "topological psychology" because I thought in this "field" houman existence and individual manifestation or ontology and science coinside. In this way, it seems that it is possible for sociology to reach ontology through psychology. Of course, it is never our intention to mix these three, or to discuss the superiority or inferiority of their respective value.