In this study, we examine whether and how policy issues addressed by political parties travel across the national and European legislative arena. We define ‘party policy issue transfer’ as the articulation of similar issues in the work of political parties at different parliamentary venues in short distance of time and argue that issues particularly transfer within the same party. This is mainly so for three reasons: exchange of information between parties across levels, national parties’ attempts to influence European Union policies, and career incentives of representatives at the supranational level. We test our theoretical framework using unique data on parliamentary questions asked by Danish representatives (the Folketing and the European Parliament, 1999–2009) and a dyadic data structure. Our results show that parties’ policy issues—in particular those over which the European Union holds legislative power—transfer across the national and European levels on a regular basis and that issues are more likely to travel within parties.