| Named By: | unavailable |
| Time Period: | Late Devonian |
| Location: | Australia and Germany |
| Size: | About 60 centimetres long |
| Diet: | Carnivore/Piscivore |
| Fossil(s): | Few specimens |
| Classification: | | Chordata | Sarcopterygii | Dipnoi | Dipteriformes | |
Griphognathus ("hook-jaw") is an extinct genus of lungfish from the late Devonian period of Europe and Australia.
Griphognathus was a specialized lungfish, about 60 centimetres (24 in) long, with an elongated snout. The lower jaw and palate were lined with tooth-like denticles. Like all other lungfish, its skin was covered by overlapping scales, and it had an asymmetrical tail.