The purpose of this study is to identify the effects of the functional motivations of volunteers on participation satisfaction and sustainability. The study was conducted on 198 volunteers in Seocho-gu, Seoul. For the analysis method, frequency analysis, reliability analysis, and correlation were performed using the SPSS 22.0 program, and regression analysis was performed on causality among variables. The study found that the functional motivations for volunteers to do volunteer work have a

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... ificant effect on their satisfaction with volunteer work. Second, the functional motivations for volunteers to do volunteer work have been found to have a positive effect on the sustainability of volunteer work. This can be said to be a positive tool in increasing the level of participation satisfaction, will to continue, and intensity for participation in volunteer work, such as self-protection, value-seeking, and social skills, which are the functional motivations for volunteers to do volunteer work. Therefore, it is thought that this study will be the basis for preparing programs to satisfy volunteers' participation in volunteer activities and to enhance their sustainability.