According to West London Sport, the deal will include the option of a permanent move if the 21-year-old right-back does well at the Italian club.
Aina has also drawn interest from a number of other clubs this summer, including PSV Eindhoven.
He has made three Premier League appearances for the Blues, all as a substitute.
His first-team experience came last season on loan at Hull City, where he made 47 appearances for the Tigers.
GET JOBS paying 1,000 dollars Monthly Abroad with visa support - APPLY FREE! HERE
Follow us on Twitter: @OkayNigeria.