Raymond Latarjet, born in Lyon on October 17, 1911 and died in Neuilly-sur-Seine on June 3, 1998, was a French biologist and radiobiologist. He is the son of André Latarjet, professor of medicine in Lyon. Raymond Latarjet, first a physicist, then a doctor, was for twenty years the undisputed and prestigious leader of French radiobiology and gave it great international renown.