This article addresses conflicts and negotiations about gender equality and diversity within the European public sphere (EPS). It aims to explore the specific constraints and possibilities for realizing gender equality and justice from the transnational European context. Research illustrates that the European Union (EU) approach to gender equality has strengthened the transnational space of mobilization and given actors new possibilities to negotiate about multiple inequalities and direct their claims at different levels. This has at the same time led to a diversification of women's claims and conflicts about the meanings and framings of gender equality and diversity within the EPS. This is illustrated by case studies of the framing of gender equality and ethno-national diversity by political actors in the European Women's Lobby and the European Parliament. The article proposes that the multilevel EU polity can be interpreted as a unique case for reframing justice in a globalized world.