Social norms, often described as the “cement” or “grammar” of society, guide human behavior and infuse it with social meaning. In this Chapter, we offer a legal perspective on whether robots should be required to adhere to social norms in the context of human-robot interactions (HRIs). To do so, we examine how the mass introduction of social robots may affect existing norms in different contexts, develop a taxonomy of HRIs as they pertain to social norms, and offer a legal-normative framework of analysis to determine whether and to what extent should robots be legally required to adhere to social norms.