This study examines the role of passion among entrepreneurs. In particular, the authors integrate identity theory with the literature surrounding passion to investigate the possible pathways through which entrepreneurial identities might influence passion, as well as the relationship between entrepreneurs’ passion and behavior. Structural equation modeling of responses from 221 entrepreneurs suggests that passion rises and falls in connection with entrepreneurial identity centrality and, furthermore, that passion is associated with individual entrepreneurial behavior and entrepreneurial self-efficacy. This research provides a starting point for investigating the factors that may impact the development of entrepreneurs’ passion as well as the specific mechanisms through which passion energizes entrepreneurial action.