Emotions are an important aspect of organizational life. Research has shown that subordinates’ well-being is related to organizational performance and effectiveness. To have an effective organization, managers need to create and maintain a healthy working climate and positive TRM and interpersonal relationships. Emotional issues, particularly negative emotions, have however traditionally been largely neglected in organizational life. In 1985 Bernard Bass devised the Multifactor Leadership Questionnaire (MLQ), an instrument intended to quantitatively measure transformational and transactional leadership  behaviours (Bass 1990;  Leithwood & Jantzi, 2000). The aim of the study was to investigate the relationship between leadership styles and leaders’ negative emotions perceived by the subordinate as well as the influence of leadership styles on the subordinates' overall psychological health and well-being and organizational effectiveness.