| Changchengornis Temporal range: Early Cretaceous,
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| Holotype specimen, Geological Museum of China | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Clade: | Avialae |
| Clade: | †Confuciusornithiformes |
| Family: | †Confuciusornithidae |
| Genus: | †Changchengornis Ji, Chiappe & Ji, 1999 |
| Species: | †C. hengdaoziensis
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| Binomial name | |
| †Changchengornis hengdaoziensis Ji, Chiappe & Ji, 1999
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Changchengornis is an extinct basal pygostylian genus from the Early Cretaceous. Its remains have been found in the People's Republic of China, in Chaomidianzi Formation rocks from around the Barremian-Aptian boundary, deposited 125 million years ago. Changchengornis was a close relative of the better-known Confuciusornis. In 1999 it was assigned to the Confuciusornithidae.
The more pointed bill of Changchengornis might indicate a diet different from that of Confuciusornis. However, of Confuciusornis itself it is contested whether it were a fish eater, an omnivore, or a seed eater.