As the social role and importance of nonprofit organizations have grown, charitable giving by the general public plays a crucial role in achieving the financial stability of charitable organizations. However, an unprecedented challenge that charitable organizations face in their fundraising activities is identifying what effective fundraising strategies to employ toward individuals to strengthen their insufficient financial base. To this end, this study sought to identify the variables that predict and explain the donation motivations and donation behaviors of charitable organization donors in relation to general individuals' sponsorship activities. This study conducted an empirical analysis on 147 respondents out of 500 donors randomly selected from individual donors to a Korean charitable organization K. The empirical analysis results revealed that identity salience motivation, a donation motivation factor related to nonprofit organizations, had the greatest influence on donation behavior, and that reciprocity, rational motivation, and altruistic motivation had positive effects on donation behavior. The donation satisfaction experience of individual donors was found to have a significant moderating effect on donation behavior. Furthermore, charitable organization donors were found to place greater importance on rational motivation than emotional motivation, and on altruistic motivation than egoistic motivation. Based on these findings, this empirical study presented implications for charitable organizations' fundraising strategies and suggested the need for extended research using psychological variables that influence individual donor behavior, as well as directions for future research.