Few studies have shown that group needs and general emotional background are reflected in group dynamics. Many theorists consider the general level of security to be the key state of the group that affects group dynamics. However, according to E. Desi and R. Ryan, the need for security is actualized with the frustration of autonomy. This empirical study is devoted to testing the relationship between group structure (centrality and density of the communication network) and group needs for autonomy, competence, belonging and security. As a result, in a sample of 110 people, it was found that the density of communication networks is positively related to the degree of satisfaction of the need for belonging and the satisfaction of the need for security, and the satisfaction of all three basic psychological needs is negatively related to centrality.