Paraphysornis is an extinct genus of giant flightless terror birds that inhabited Brazil during Late Oligocene or Early Miocene epochs.

Paraphysornis was 2.4 m (7 ft 10 in) tall and weighed approximately 180 kilograms (400 lb). It was calculated at having been around 1.4 m (4 ft 7 in) high at the back. Like Brontornis, Paraphysornis is more massively built than other phorusrhacids and has a shorter and stouter tarsometatarsus, which indicates less cursorial and possibly carrion-feeding habits.