Impidens[a] is an extinct genus of large omnivorous cynodont from the Triassic of South Africa and Antarctica.

[b] Impidens inhabited high-latitude environments of southern Gondwana during the Middle Triassic, where it was probably the apex predator.

[1] Impidens was one of the largest non-mammalian cynodonts, with a skull well over 400 millimetres (16 in) long, though the herbivorous Scalenodontoides from the Late Triassic was even larger.

Impidens fossils are known from the Cricodon-Ufudocyclops subzone of the Cynognathus Assemblage Zone of the Beaufort Group in South Africa and the upper Fremouw Formation in Antarctica.

The Cricodon-Ufudocyclops subzone was deposited in a meandering river environment, with a deep channel and high banks.