The Treaty of Accession 1994 was the agreement between the member states of the European Union and four countries (Norway, Austria, Finland and Sweden), concerning these countries' accession into the EU.

The Treaty arranged accession of Austria, Finland and Sweden to the EU and amended earlier Treaties of the European Union.

As such it is an integral part of the constitutional basis of the European Union.

Norway failed to join the EU because its referendum did not pass.

[1][2] The full official name of the treaty is: Treaty between the Kingdom of Belgium, the Kingdom of Denmark, the Federal Republic of Germany, the Hellenic Republic, the Kingdom of Spain, the French Republic, Ireland, the Italian Republic, the Grand Duchy of Luxembourg, the Kingdom of the Netherlands, the Portuguese Republic, the United Kingdom of Great Britain and Northern Ireland (Member States of the European Union) and the Kingdom of Norway, the Republic of Austria, the Republic of Finland, the Kingdom of Sweden, concerning the accession of the Kingdom of Norway, the Republic of Austria, the Republic of Finland and the Kingdom of Sweden to the European Union.