The Albania midfielder becomes Black Cats boss Steve Bruce's third signing of the summer following the arrivals of Paraguay skipper Paulo Da Silva and England Under-21 striker Fraizer Campbell."I'm delighted to have brought Lorik to the club, especially given the number of clubs who had expressed an interest in signing him," said Bruce, who had earlier described the player as being "right up my street".
Cana, who turns 26 on Monday, has 31 caps for Albania and helped Marseille to a second-placed finish behind Bordeaux in Ligue 1 last season.
Bruce added: "He brings with him a tremendous amount of experience both at club level and internationally and is a great addition to our squad.
"To captain a side of Marseille's stature says a lot about the player and his character, and I'm sure he'll go on to be a fantastic signing for Sunderland."
