In this article, I consider the interpersonal support, i.e., scaffolding, that agents provide to one another to share emotions. Moreover, the main target of this paper is to identify those scaffolds and their features that effectively function to boost, support, or enable emotional sharing interactions. To do so, I engage with the “multi-dimensional framework of environmental scaffolding” proposed by Sterelny (_Phenomenology and the Cognitive Sciences_ 9:465–481, 2010). This framework highlights various types of environmental resources, including social and interpersonal factors, that (...) serve as scaffolds for human cognitive agency. Furthermore, the model identifies the functional characteristics associated with these resources, which significantly contribute to scaffolding cognitive (and emotional) performance and skillfulness. Mainly concentrating on social interaction, I argue that individual, familiar social interaction behaviors, shared references, and shared bodily-affective and habitual patterns scaffold the interacting individuals allowing them to effectively share emotions. By examining the functional relationship between these particularly interpersonal scaffolds and shared emotions, I suggest that we can better understand the complex, situationally unfolding dynamics and the versatility of conditions that can boost emotional sharing. As a result, my analysis reveals that there are different types of social interactional scaffolds that vary in familiarity, predictability, robustness, individualization, and mutual adaptation. These features boost and trigger emotional sharing in degrees and different functions and different degrees of these functional features; therefore, different types of social interaction scaffolds are required depending on the situation to situation. (shrink)