Parental socialization is thought to be crucial in shaping children's ability to experience and express gratitude. The present article presents a systematic review to understand how parental socialization practices influence the development of gratitude in children. Following PRISMA guidelines, we identified 12 relevant empirical studies and analyzed them to address three main questions. We sought to understand how parents perceive and promote gratitude in their children, the strategies they use to foster gratitude, and the parental characteristics that predict gratitude development in children. Our findings indicate the need for more empirical studies with diverse methodologies and specific objectives to deepen our understanding of parental gratitude socialization. This systematic review contributes to a comprehensive understanding of gratitude development among children and serves as a reference for the development of interventions and educational curricula to foster gratitude among children, with parents as key socializing agents.