The European Union (EU) exerts growing influence on health, education, and social policy, with direct implications for the practice and science of psychology. Yet psychologists remain underrepresented in EU-level debates, risking leaving psychosocial perspectives absent from key legislative and funding frameworks. This gap weakens the visibility and impact of psychology in areas where evidence-based contributions are urgently needed. At the same time, psychology has much to gain: mental health is now firmly on the EU agenda, and the EU provides platforms where collective scientific voices can influence policy directions and support national practices. Psychology, by nature both scientific and societal, is uniquely placed to inform these debates. Speaking with a unified, evidence-based voice allows psychologists to shape European initiatives that protect mental health, advance social well-being, and enhance professional practice across Member States. This contribution will explore why the EU matters for psychology, how engagement at the European level reinforces national efforts, and why it is essential for the discipline to strengthen its presence in EU policymaking.