This article investigates the gender differences in participation in voluntary organizations across the life course in Italy. It shows that three forms of engagement in voluntary organizations-donating money, attending meetings, and doing unpaid work-may depend on some stages of the life course-leaving the parental home, forming a union, and becoming a parent-as it is plausible that they may change personal resources and pose constraints or provide opportunities for involvement. Using the household survey "ISTAT Multipurpose Survey-Aspects of daily life", the article finds that while leaving the parental home is positively associated with both men's and women's involvement, forming a union, and being a parent is detrimental for women's involvement and not for men's. This pattern indicates that gender roles may constrain more women's than men's probability of participation in voluntary organizations.