Christine Riviere, 51, was sentenced for her "unfailing commitment" to jihad and for helping a number of young women travel to Syria as part of attempts to find a bride for her son, Tyler Vilus.
It was the maximum sentence possible.
Vilus travelled to Syria to fight alongside the Islamic State group.
Riviere, who has been nicknamed "Mama Jihad" in the French press, visited him three times in 2013 and 2014.
She was arrested in July 2014 as she was preparing a fourth visit.
Vilus was arrested a year later in Turkey, from where he was extradited to France.