"Bringing experience and helping the young players is what I have done my whole career," Sky Sports News quotes Abidal as saying. "I am very happy to be able to do it here. Monaco is special to me; it is where it all started for me. It was my first choice.
"I had to fight against disease. Now the most important thing is to put Monaco in a position to win the national title again and play in the Champions League."
Abidal previously played for Monaco between 2000 and 2002.