This chapter is concerned with the role of emotions in leader-follower relations. The central question in this chapter is how the emotional expressions of a leader influence the emotions, cognitions, attitudes, and behaviors of followers, and what the consequences are for leadership effectiveness. Research in this area has documented that leaders' emotional expressions may influence follower behavior and leadership effectiveness by triggering affective reactions (e.g., emotional contagion, liking of the leader) as well as inferential processes (e.g., inferences regarding performance quality) in followers. I will discuss studies on the contingencies of these processes and their outcomes, many of which relate to followers' information processing or the perceived appropriateness of the leaders' emotional displays. In this area, too, emerging evidence points to a critical role of emotional intelligence in determining the social effects of emotions, and this research is also reviewed.