With the emergence of electronic commerce, the development of social networks has introduced the concept of social commerce. Since accepting new technology can be somewhat challenging for Internet users, this study examines the effect of perceived risk on the adoption of social commerce from their perspective. For this purpose, a conceptual model based on the Technology Acceptance Model (TAM) has been created to take into account different types of risks, including financial, functional, social, time, psychological, and privacy risks. The results of the study, which applied a structural equation modelling (SEM) approach and partial least squares (PLS), revealed that, among 277 active users of social media, perceived risk has a significant impact on the perceived usefulness of social commerce. Moreover, among the different constructs of risk, psychological and social risks have no noticeable effect on commerce adoption.