Jean-Jacques Favier (Born April 13, 1949) was a French engineer and CNES astronaut who flew aboard the STS-78 NASA Space Shuttle mission. Favier was due to fly aboard the Columbia mission in 2003, but later signed out of the mission. Jean-Jacques Favier has been Deputy Director for Space Technology and Deputy Director for Advanced Concepts and Strategy at CNES, Director of the Solidification Laboratory at the French Atomic Energy Commission and Research Program Director at the International Space University.