| Named By: | Z. Dong in 1990 |
| Time Period: | Middle Jurassic, 170 Ma |
| Location: | China - Shishougou Formation |
| Size: | Around 4.8 to 5 meters long for the remains found, though older individuals would have likely been larger |
| Diet: | Herbivore |
| Fossil(s): | At least 17 individuals represented by partial remains, probably of juveniles |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropodomorpha | Sauropoda | Mamenchisauridae | |
Bellusaurus (meaning "Beautiful lizard", from Vulgar Latin bellus 'beautiful' (masculine form) and Ancient Greek sauros 'lizard') was a small short-necked sauropod dinosaur from the Middle Jurassic which measured about 4.8 metres (16 ft) long. Its fossils were found in Shishugou Formation rocks in the northeastern Junggar Basin in China.