The 30-year-old centre half was out of contract and has decided to move on to the League One side.
Signed by Ray McKinnon from his home town team Dundee in 2015, Benedictus scored on his competitive debut for Rovers in a 3-0 win over Albion Rovers, one of five goals he would notch up in an impressive season where Raith would make the Premiership play-offs only to be knocked out by Hibs.
He was made team captain at the start of the 2017/18 campaign under new manager Barry Smith and kept hold of the armband when John McGlynn took over as boss later that season.
He led the team to the League One title and promotion back to the Championship in the truncated 2019/20 season, which also saw him pick up a winner’s medal as Rovers shared the Challenge Cup with Inverness.
After three years away from the Championship the team exceeded expectations and finished third, losing out to Benedictus’s former employers Dundee in the Premiership play-off semi-final.
His last season at the club would be a slight disappointment, finishing fifth in the table, missing out on a play-off place and the captain himself sat out on the undoubted highlight as he was suspended for the SPFL Trust Trophy final victory over Queen of the South.
In total during his seven years at the club, Benedictus made 271 appearances, scoring 12 goals.
Raith manager Ian Murray said he leaves Stark’s Park with the club’s best wishes.
“He’s been a mainstay within the side,” he said.
"I had a good chat with Bene telling him my thoughts and hearing his.
"He’d received a really good offer elsewhere and sometimes a player has to make a decision that’s right for them.
"You have to look after a player first and foremost, that’s important, and Bene was given the opportunity to move to Dunfermline.
“He leaves with our best wishes. He’s been a great servant and talisman for the club over the last few years.”
Murray says the decision as to who takes over as the team’s captain won’t be taken until after the players are back in pre-season training from Saturday.
Christophe Berra was last season’s vice-captain but Ross Matthews may also be in the frame, leading the team to the SPFL Trust Trophy victory when both Berra and Bendictus were unavailable.