Today, in the conditions of reforming the education system, there is an increase in the requirements for the psycho-emotional capabilities of participants of the educational process. One of the tasks of modern education is the development of socio-emotional skills. The problem of supporting the emotional well-being of schoolchildren seems to be especially relevant today. However, the nature of individual differences in emotional well-being has not been determined. The purpose of this article is a theoretical review of scientifi c approaches to the study of individual differences in emotional well-being in the school environment carried out in order to develop a unifi ed approach to the study of emotional well-being in a sample of Russian schoolchildren. Theoretical methods were used, such as a review of the scientifi c literature of Russian and foreign authors, a systematic, comparative and logical analysis of modern concepts of the emotional well-being of schoolchildren. Currently, emotional well-being is considered from different positions: as a synonym for subjective well-being (Diener E., Kahneman D., Deaton A., L.V. Kulikov), as an element of psychological well-being (Kendal S., Callery P., Keeley P. , Yu.B. Grigorova), as an indicator of the success of emotional regulation (D.S. Nikulina, G.A. Uruntaeva, Schutte N. S., Ferreira M. B.) . Summarizing, emotional well-being of a schoolchild can be considered as a multidimensional phenomenon, the basis of which is the satisfaction of the biological and social needs of the schoolchild, indicating success of emotional regulation. Promising areas of research into individual differences in the emotional well-being of schoolchildren include: positive self-concept; experiencing your own success; attitude to the situation of knowledge testing; academic progress; general satisfaction with educational activities and relationships with parents, peers and teachers. We suppose that taking into account the individual characteristics of the child, his success in school increases, though further research is needed.