The 22-year-old, who has served as one of Ferrari's test drivers last year, has been guaranteed a minimum of participating in nine Friday practice sessions this season.
Bianchi, who never once stepped into the Ferrari during a grand prix weekend, feels a move to Force India is a step in the right direction in terms of landing a permanent race seat in the future.
A delighted Bianchi, who finished third in each of the last two seasons in the GP2 championship and will remain part of Ferrari's young driver academy, said: "The chance to get track time during race weekends is an important step for me.
"Being regularly in a current car is the best way to learn quickly, and I hope it will put me in a strong position to one day move into a race seat.
"The next few months will be really exciting as I get to know the team, see how they work, and prepare for my time in the car."
Force India team principal Vijay Mallya believes Bianchi will prove himself a key addition to the team.
He said: "We always keep an eye on young, talented drivers and his performance in GP2 certainly impressed us all.
"By giving Jules the opportunity to be part of our 2012 campaign, we continue to demonstrate our commitment to young drivers.
"We are proud of our track record in this regard and I have no doubt Jules will quickly settle into the team and make a valuable contribution to our efforts on track this season."
Force India, who have Paul di Resta and Nico Hulkenberg at the wheel of their cars this season - the latter replacing the ditched Adrian Sutil - are due to unveil their latest challenger next Friday at Silverstone.