Esteban Granero has joined Real Sociedad from Queens Park Rangers for an undisclosed fee.
The 27-year-old midfielder, who has penned a "long-term contract", spent last season on loan with the La Liga club.
Granero arrived at Loftus Road from Real Madrid in 2012, but he struggled to make an impact during his time with the R's.
Meanwhile, QPR boss Harry Redknapp has admitted that he is confused as to how Loic Remy failed a medical ahead of a proposed move to Liverpool.