| Named By: | P. K. Tchudinov in 1960 |
| Time Period: | Middle Permian |
| Location: | Russia, Perm |
| Size: | Skull 30 centimetres long. Body estimated between 1.5 and 2 meters long |
| Diet: | Carnivore |
| Fossil(s): | Partial skull (PIN 1758/3) |
| Classification: | | Chordata | Therapsida | Dinocephalia | Anteosauridae | |
Archaeosyodon is an extinct genus of dinocephalian therapsid. It was medium-sized, reaching about 1.5-2 m (4-5 ft) in length.