Trust, which dominates the research on online shopping behavior, is relevant to various consumer behaviors across different online shopping stages. To provide a big picture of the research on trust in the online shopping context, this chapter reviews the literature on this topic and summarizes the major research findings. Specifically, trust-related behaviors are identified according to the three online shopping stages: information adoption and information disclosure behavior at the pre-purchase stage, product purchase behavior at the purchase stage, and relational behavior such as electronic word-of-mouth (eWOM) and re-purchase at the post-purchase stage. The research topics relevant to these behaviors, including recommendation agent, information credibility, privacy concern, trust building and transfer process, and relationship marketing in the online shopping context are detailed. The future research directions such as location-based services, trust and distrust, and trust repair are also highlighted.