Hans Dieter Trayer (born in 1934) is a German actor, a key figure of the New German Cinema. He is particularly known for his frequent collaborations with directors Werner Herzog and Rainer Werner Fassbinder.

With Herzog, Trayer delivered memorable performances in iconic films such as *Aguirre, the Wrath of God*, *Nosferatu the Vampyre*, and *Fitzcarraldo*. For Fassbinder, he appeared in works such as *The Marriage of Maria Braun* and *Effi Briest*.

His distinctive screen presence often saw him portraying stern and authoritative figures, military officers, or subtly sinister characters. Even in supporting roles, his intensity and gravitas made his contributions stand out, solidifying his legacy as a versatile and impactful character actor of his generation.