Recent studies have shown the fact that leaders are often faced with several potential issues of professional adaptation, for example, the difficulty of setting up a team, building good interpersonal relationships, the impossibility to interact efficiently (Caruso & Salovey, 2012, p. 20). The premise of our research is the fact that promoting and building emotionally intelligent leader(ship) is essential for cultivating a comfortable mental climate and team work spirit, as well as for building

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... nterpersonal relationships. The purpose of this research is twofold: to present the concept of emotional intelligence by highlighting its defining dimensions and applicative nature, respectively to evaluate its level of development at leaders. The ability to interact efficiently, cultivating a healthy environment, stimulating trust and a responsible conduct constitute a real challenge for a leader. To be successful, a leader should constantly replenish his leadership skills through an efficient use of emotional intelligence. In this case, "know thyself!" gains a special signification: that of knowing the others for the benefit of the entire team.