This article examines the role of social class for individual participation in social movements, more specifically in street demonstrations. The authors use protest survey data in order to avoid the limitations of previous research by contextualizing the effect of social class on participation in protest. The analysis focuses on demonstrations addressing redistributive and cultural issues, reflecting a well-known distinction between old and new social movements. The authors show that participants in these two types of demonstrations, as well as in a third, mixed category, present a similar class structure, which casts some doubts on this distinction, although slight differences remain. Furthermore, a comparison of three countries that differ in terms of the strength of the class cleavage (Belgium, Sweden, and Switzerland) suggests that this cleavage acts as a moderator of the relationship between social class and participation in street demonstrations.