The common African fat mouse is a small rodent of southern African grasslands and savannas. It is nocturnal and digs burrows.
A southern African identification guide describes a stout animal with a head-and-body length of 83–106 mm and mass of 33–55 g. The back is brown to ochre-brown, the underside and feet are white, and the fur is short and sleek.
In southern African accounts it is nocturnal, terrestrial, and solitary or paired, and digs multi-tunnel burrows in loose sandy soil. A summer diet study in Kruger National Park found mostly seeds, with insects and herbage also eaten.
IUCN Red List · Least Concern (LC) · Global