This article contributes new knowledge on the insertion of Spain into the European integration project and shows how European Investment Bank (EIB) policy, in the form of loans, helped boost the Spanish economy. EIB loans to Spain promoted both the Trans-European Networks (TENs) and the funding of enterprises. We argue that the funding of TENs encouraged the integration of Spain into the European space, whilst the funding of enterprises helped consolidate their competitive position, facilitating their expansion abroad.