Shidaisaurus is a genus of basal tetanuran theropod dinosaur. Its fossil was found in early Middle Jurassic-age rocks of the Upper Lufeng Formation in Yunnan, China. It is known from a partial skeleton, holotype DML-LCA 9701-IV, found at the bottom of an assemblage of nine dinosaur individuals, lacking most of the tail vertebrae, ribs, pectoral girdle, and limb bones. Shidaisaurus was described in 2009 by Wu and colleagues. The type species is S. jinae. Generic name and specific name in combination refer to the Jin-Shidai ("Golden Age") Company that exploits the Jurassic World Park near the site. It was a metriacanthosaurid allosaur and grew to a length of more than 5.6 meters.