The Brazilian youngster joins Johan Djourou and Andre Hoffmann as the club's new signings in January and has already passed a medical.
He has signed for Hannover on a three-and-a-half-year deal, keeping him with the club until 2016, and will join up with his new team-mates on Tuesday.
Speaking to Hannover's website, director of sport Joerg Schmadtke praised the quality of the club's new acquisition.
"Franca, at 1.90 metres and 88 kilograms, is in good physical condition and he brings with him a great passion for the game," he said.
"He is a rugged-type of player who will, in my opinion, forge a career with us."
Hannover coach Mirko Slomka also spoke with optimism on Franca's potential impact in the near future.
"I look forward to working with Franca and I am sure that he is motivated and ambitious and looking to seize his chance," the 45-year-old said.
"I have great experience working with South Americans and I appreciate their commitment and their enthusiasm for learning. I am convinced Franca is no different."