Given that today's younger generation will face the future environmental consequences of ecologically harmful purchasing habits, it is necessary to understand how the youth inherit green purchase attitudes from the older generation. This study aimed to examine the intergenerational transmission of green purchase attitudes from parents to their adolescent children in a non-Western country, the Philippines. Moreover, this study sought to investigate the mediating role of adolescents' social responsibility in the link between Filipino parents' and their adolescent children's green purchase attitudes. Using 437 parent-adolescent dyads, our findings revealed that parents who endorse positive attitudes toward purchasing green products could influence their adolescent children's favorable attitudes in buying ecofriendly products via an increase in adolescents' social responsibility. Implications for parenting, education, and policy as channels to promote environmentally responsible purchasing in non-Western and developing nations such as the Philippines are discussed.