The midfielder comes in on a four-year deal for an undisclosed fee to become Claudio Ranieri's first signing at the King Power Stadium
Ranieri was searching for a defensive midfielder to fill the gap left by Esteban Cambiasso after he decided not to renew his contract with the Foxes.
The 24-year-old is City's fourth signing of the summer after Robert Huth, Christian Fuchs and Shinji Okazaki and could make his debut in Saturday's Barclays Premier League opener at home against Sunderland.
He joined Caen from US Boulogne in 2013 and helped them to promotion from Ligue 2 a year later and played 37 times, scoring twice, in Ligue 1 last season.
Source : PA
Source: PA