Fushanosaurus (; meaning "Fushan lizard", after the Fushan Museum where its remains are stored) is a genus of sauropod dinosaur from the Shishugou Formation from Xinjiang Province in China. The type and only species is Fushanosaurus qitaiensis (). It is solely known from the holotype specimen FH000101, a complete right femur.
The holotype femur of F. qitaiensis is long. By comparison to two other giant sauropods from Asia, Ruyangosaurus and Daxiatitan, Fushanosaurus was estimated to have been approximately long, which would then make it one of the longest known dinosaurs.
Fushanosaurus was originally described as a titanosauriform, but the features initially believed to indicate titanosauriform affinities are actually more widespread among sauropods, and Fushanosaurus may be a mamenchisaurid, the only group of sauropods definitely known to be present in the Shishugou Formation.