Having found playing time limited, with just five appearances in the Italian top-flight this term, Benatia has opted to team up with the second-placed team in the Qatari top-flight.
The club announced that Al Duhail
"Juventus salutes Benatia after two and a half seasons together," read the club statement.
"A great ability to always respond to the call, to do it with high-level performances and scoring goals that have earned a Cup.
"For all this we sincerely thank Benatia, wishing him the best for his professional future."
After impressing on loan in the 2016-17 campaign, Benatia made a permanent move to Turin from Bayern Munich n June 2017 and was a core member of their defensive set-up.
His contribution was notable during last season's Coppa Italia final against AC Milan where he scored a brace that handed Massimiliano Allegri's side a 4-1 win over the San Siro outfit.
Benatia scored three goals in 40 Serie A appearances, two goals in six cup outings and played 14 games for the Old Lady in the Uefa Champions League.