Using structural equation model, this research examines mainly the relationship between leisure volunteering participation and mental health of leisure volunteers in Taichung. The result shows that leisure volunteering participation impacts mental health positively, that is, the higher the level of leisure volunteering participation, the higher the level of participants' mental health. The result also shows that there are not significant differences among different age and educational groups between Leisure Volunteering and mental health. Other research findings and implications are discussed in the research.