The white-nosed saki (Chiropotes albinasus) is a species of bearded saki, a type of New World monkey, endemic to the south-central Amazon rainforest in Brazil. Both its scientific and common name were caused by the authors working from dead specimens, where the skin on and around the nose fades to a whitish color. In living individuals, the nose is actually bright pink (though with fine barely visible white hairs). Pelage on the body tends to be black in males and brown to brownish-grey in females. No other species of the genus Chiropotes have a brightly coloured nose.

This species is considered to be "medium-sized". They are a primary consumer that eats seeds, fruit, flowers, bark, insects and leaves. They are also a social species that arrange themselves into large groups for many reasons such as sleeping, food gathering and travel arrangements. These social groups are important in situations where they are under attack by a predator as they decide on their anti-predation strategies depending on the number of them available at the time. They are seasonal breeders, only reproducing in specific months during the year. In the 2020 IUCN Red List report, this species was listed as vulnerable with a decreasing population.