The 2008 Prix de l'Arc de Triomphe was a horse race held at Longchamp on Sunday 5 October 2008.

The winner was Zarkava, a three-year-old filly trained in France by Alain de Royer-Dupré.

The winning jockey was Christophe Soumillon.

[2] Zarkava had been a doubtful runner because of the soft ground at Longchamp.

Her participation was confirmed just before the start.