Emotions are an essential component of human behavior and action. We live with emotions every day, so it is important to see and interpret non-verbal signs of expressing emotions in the right way. Here we come to emotional intelligence, which since the beginning of the 21st century has come to the fore as a separate topic in the field of business management. Awareness of one's own emotions and their impact on one's own behavior is important for quality interaction with others. As emotions and their proper interpretation determine the success of communication, so the leader and his characteristics determine the success of the organization in general. Thus, in order for an organization to be successful in general, a leader in addition to professional competencies and abilities needs to possess emotional intelligence. In order to successfully manage and lead the members of the organization, it is important to find the right way to motivate them. An employee who is satisfied with the working conditions will greatly positively affect the success of the organization with his increased effort and desire for progress. Being a leader and aligning all requirements is a very difficult job, but it has been proven that it can be learned and perfected. Every leader has a certain leadership style that is largely defined by the characteristics of the leader himself. Newer theories dictate the use of a situational approach to leadership, but in practice only one style is mostly used. The paper explores the connection between emotional intelligence and leadership style. It consider the influence of the level of emotional intelligence on the way people and the organization are managed. Due to the growing awareness of possessing emotional intelligence and its great impact on practice and business, it was chosen as a determinant that determines the difference in the use of leadership style in private and public sectors. The aim of this paper is to determine the relationship between emotional intelligence, ie personality characteristics (expressed as "comfort" as part of personality tests of the Big Five) and leadership styles (measured by Likert's dimensions of leadership). The research will be conducted using a survey questionnaire. Managers from various business organizations and school principals will be interviewed to distinguish between the private and public sectors.