Vygotsky's sociocultural theory (VST) has been increasingly utilised as an effective framework to account for the role of emotions in learning and development. Yet, within VST, emotion has neither been systemically theorised nor investigated. This paper contributes to the literature by offering a theoretical discussion of Vygotsky's perspective on emotion and its relation to cognition. Employing a content analysis approach, three of Vygotsky's key texts on emotions were closely read and analysed with emerging themes grouped into a system of interrelated theoretical tenets. The insights gained from this paper benefit scholars who are interested in understanding and researching emotions from a VST perspective as well as provide important implications for educational practices.