The subject of this paper is the influence of organizational structure on employee behaviour. The goal is to provide structures and the way they are formed, to look at the existence of the group and to connect the paralysis between their behavior and the organizational structure in which they are located. After the introductory part, the methodology of the work and ways of proving the set topic are studied. In the third part, the concept of organizational structure and the dimensions from which it is created is explained, it also presents the most common structures in companies: simple, matrix and bureaucratic, and it presents the appearance and advantages and disadvantages, the differences in the structure are considered, and we come to the core of the work, which is the behavior of employees in organization. The work is based on groups in the organization, given that each group is influenced by the individual behavior of the employees and influences their work. The group is defined and the method of formation and the models according to which it is formed are explained. The organizational structure greatly influences the behavior of employees, considering the qualities and knowledge that the employee has, he will tend to the company with principles similar to his own, and it is up to the manager to know how to recognize the right person for his company, who will correspond to the position and structure, so that there will be no conflict of interest in the future because personality, quality and knowledge affect the group in which one is, and thus the company's goal.