Hypolycaena nigra, the black fairy hairstreak, is a butterfly in the family Lycaenidae. It was described by George Bethune-Baker in 1914. It is found in Sierra Leone, Liberia, Ivory Coast, Ghana, Nigeria, Cameroon, Gabon, the Republic of the Congo, the Central African Republic, the Democratic Republic of the Congo, Uganda and north-western Tanzania. The habitat consists of forests.