Race traitor is a pejorative reference to a person who is perceived as supporting attitudes or positions thought to be against the interests or well-being of their own race. For example, one or both parties to an interracial relationship

Miscegenation

Miscegenation is the mixing of different racial groups through marriage, cohabitation, sexual relations, and procreation....

 may be characterized as "race traitors." The term may indicate racialist

Racialism

Racialism is an emphasis on race or racial considerations. Currently, racialism entails a belief in the existence and significance of racial categories, but not necessarily that any absolute hierarchy between the races has been demonstrated by a rigorous and comprehensive scientific process...

 attitudes on the part of those who use it.

The term is the source of the name of a quarterly magazine, Race Traitor, founded in 1993.