Despite the globalization and digitalization of society, loneliness is a common occurrence in the contemporary world. It can affect the life and psychological health of an adult so it is important to ask ourselves how it affects the life of a small human being than, a developing person, a child. The question is how loneliness affects its social, emotional and cognitive development and how it manifests itself in behavior and ultimately - what are the consequences of growing up as a socially lonely child. The aim of the research is to pay attention to the loneliness of children at the earliest age and try to answer the question - Who is responsible for it? Is it personal competence, parents, social environment and/or professional body in educational institutions. In order to answer the asked question, all external and internal factors will be described in detail. Outside factors make the key words - social environment and the issue of relationship between the individual and the social environment, and internal factors mostly relate to the individual's social competence. One of the starting arguments is the assumption that the environment plays an important role in social relations and can be influenced, particularly from the position of educators, in a way to create a warm and accessible social climate that will encompass all children and contribute to a better development of social relations. The research will be conducted according to a qualitative paradigm by comparing and describing professional literature and contemporary research. In this way, the key factors and consequences of the problem of social loneliness will be considered and presented. According to that, the question of relation between social relationships and the appearance of loneliness will be discussed. Also, research will use us as an insight into all aspects of the problem for better understanding and finding possible preventive behaviors in the future, which could be useful to all who are in the role of the educator.