The European Conservatives and Reformists (ECR) is a soft Eurosceptic, anti-federalist political group of the European Parliament. The ECR is the parliamentary group of the European Conservatives and Reformists Party European political party (formerly known as the Alliance of Conservatives and Reformists in Europe or Alliance of European Conservatives and Reformists, but also includes MEPs from four other European parties and thirteen MEPs without European party affiliation.

Euroscepticism, also spelled as Euroskepticism or EU-scepticism, is a political position involving criticism of the European Union (EU) and European integration. It ranges from those who oppose some EU institutions and policies, and seek reform, to those who oppose EU membership and see the EU as unreformable. The opposite of Euroscepticism is known as pro-Europeanism, or European Unionism.