Leveraging the wealth of research insights generated over the past 25 years, we develop a model of emotional contagion in organizational life. We begin by defining emotional contagion, reviewing ways to assess this phenomenon, and discussing individual differences that influence susceptibility to emotional contagion. We then explore the key role of emotional contagion in organizational life across a wide range of domains, including (1) team processes and outcomes, (2) leadership, (3) employee work attitudes, (4) decision-making, and (5) customer attitudes. Across each of these domains, we present a body of organizational behavior research that finds evidence of the influence of emotional contagion on a variety of attitudinal, cognitive, and behavioral/performance outcomes as well as identify the key boundary conditions of the emotional contagion phenomenon. To support future scholarship in this domain, we identify several new frontiers of emotional contagion research, including the need to better understand the “tipping point” of positive versus negative emotional contagion, the phenomenon of counter-contagion, and the influence of computer mediated communication and technology within organizations and society on emotional contagion. In closing, we summarize our model of emotional contagion in organizations, which we hope can serve as a catalyst for future research on this important phenomenon and its myriad effects on organizational life.