The Cameroonian will play for Barcelona in the 2012/2013 season.
Arsenal FC has agreed to sell Cameroonian international, Alex Song, to Barcelona.
The deal is believed to be worth 17 million pounds.
Song’s exit comes 48 hours after Arsenal lost their captain, Robin Van Persie to arch-rivals- Manchester United.
Song was phenomenal for Arsenal last season, providing 14 assists, while Van Persie was the club’s highest goal scorer last season, scoring 37 goals in all competitions.