In this study, continuous mullite (3Al(2)O(3)center dot 2SiO(2)) nanofibers were fabricated by sol-gel and electrospinning techniques and calcined at high temperatures to obtain pure ceramic mullite nanofibers. Detail structural characterizations suggested that the productive rate of electrospun mullite nanofibers were very high and the sintered nanofibers were made of single crystalline grains with size of similar to 100 nm.