This study is aiming to explore the mechanism by which consumers' trust propensity affects their continuous use intention toward the sharing economy platform. The results suggest that organizational legitimacy mediates the relationship between trust propensity and continuous use intention. Moreover, we find that perceived social impact of the sharing platform moderates the indirect effect of consumers' trust propensity on continuous use intention via organizational legitimacy. This study illustrates the roles of users' personality trait and sharing platforms' social attributes in explaining consumer behavior in sharing economy. In addition, theoretical and practical implications are offered.