The Antichrist (German: Der Antichrist) (also could be translated as The Anti-Christian) is a book by the philosopher Friedrich Nietzsche, originally published in 1895.

One of the most controversial of Nietzsche's books, The Antichrist sets out to denounce and illegitimize not only Christianity itself as a belief and a practice, but also the ethical-moral value system which modern western civilization has inherited from it.

This book can be considered a further development of some of his ideas concerning Christianity that can be found in Beyond Good and Evil and in The Genealogy of Morals, particularly the idea that the present morality is an inversion of true, noble morality.