Spanish midfielder Moises Hurtado has signed a three-year contract with Olympiakos, the Greek club announced on Wednesday.
No financial details of the contract were revealed by the team.
Hurtado, 29, has played for Espanyol since 1999 and was given on loan to Eibar for one season (2004/05).
He has also made one appearance and scored one goal for the Catalonia regional team.
He is the latest in a wave of signings as new Olympiakos coach Ernesto Valverde attempts to retrieve the championship title away from cross-city rivals Panathinaikos.
Last week Valverde signed two new international strikers in Serbian Marko Pantelic and the Hungarian Krisztian Nemeth from Liverpool.
He has also brought in Spanish striker David Fuster from Villarreal and veteran Dane Dennis Rommedahl.