Many non-profit organizations are facing financial difficulties and will result in shortage of human resources. Therefore, the purpose of this study was to investigate the differences on participating motivation and job satisfaction for student-volunteers based on their personal variables (genders, age groups, educational levels, and living areas). The findings of this study will provide useful information for non-profit organizations to recruiting volunteers. The findings were: 1. There were significant differences found on social achievement and relationship development between genders. 2. There were significant differences found on social achievement and social service among different age groups. 3. There were significant differences found on social achievement and social service between educational levels. 4. There were significant differences found on social achievement, social service, and relationship development among different living areas. 5. There was no significant difference found on job satisfaction between genders. 6. There were significant differences found on organizational benefits and job-recognition among different age groups. 7. There were significant differences found on organizational benefits, self-recognition, job-recognition between educational levels. 8. There were significant differences found on organizational benefits and job-recognition among different living areas.