Ayam Cemani is an uncommon and relatively modern breed of chicken from Indonesia. Ayam means "chicken" in Bahasa Indonesia. Cemani refers to the village on the island of Java this breed originates.

Their beak and tongue, black comb and wattles; even their meat, bones, and organs appear black. However, their blood is normally colored. The birds' black color occurs as a result of excess pigmentation of the tissues, caused by a genetic condition known as fibromelanosis. This gene is also found in some other black fowl breeds.

The roosters weigh 2–2.5 kg and the hens from 1.5–2 kg. The hens lay cream-colored eggs with a slight pink tint, although they are poor setters and rarely hatch their own brood. Eggs weigh an average of 45 g.