This study explored the differences in donation intention between younger and senior generations, based on the inference that donation intention would differ according to age. The analysis results showed differences in donation intention between younger and senior generations. Specifically, senior generations exhibited a higher propensity for donation intention than younger generations. Next, the moderating factors affecting the differences in donation intention between younger and senior generations were examined. First, based on the measurement of psychological distance according to spatial distance from construal level theory, the closer the perceived distance between oneself and the donation recipient, the higher the donation intention. However, this difference appeared only among senior generations, not among younger generations. Second, regarding the relationship with moral identity, senior generations showed a relatively high propensity for donation intention regardless of moral identity level, while among younger generations, the group with a higher level of moral identity showed higher donation intention than the group with a lower level. Finally, when moral identity was subdivided into two dimensions (internalization vs. symbolization) to analyze donation intention among the younger generation, donors with high moral identity in the symbolization dimension rather than the internalization dimension showed higher donation intention. The implications that can be drawn from these findings include: since prosocial behavior such as donation intention shows a more positive tendency with increasing age, a targeted promotional strategy aimed at younger generations rather than senior generations is required for more aggressive donation promotion strategies. Additionally, differential motivational factors affecting donation intention should be identified for each generation, and differentiated strategy implementation utilizing the differences in psychological mechanisms across generations is required.