[1] The origin of this secretariat of state dates back to July 26, 1977[2] when prime minister Adolfo Suárez officially applied for admission of Spain in the European Communities, three days after the Cortes Generales approved it.

After this, the Foreign Minister Fernando Morán López assumed a main role in the negotiations being supported by the Secretary of State for Relations with the European Communities, culminating in the signing of the accession agreement in June 1985 and entry into force in January 1986.

[5] With the entrance of Spain in the Union, the country quickly became one of the most important and influential countries of the EU by assuming important offices such as High Representative for the Common Foreign and Security Policy with Javier Solana and the Presidency of the European Parliament with Josep Borrell and Manuel Marín (being considered the father of the Erasmus Programme).

The first and second Secretaries of State had to work with a very small staff because this department originally was devised as an auxiliary body to the Minister in the accession negotiations but in 1985 an important reform was carried out in the Foreign Ministry.

With the entry in the Union, the Secretariat of State was focused not in negotiations affairs but in coordination between the Spanish administrations and the European institutions.