Hollow Horn Bear was a Brulé Lakota chief. He fought in many of the battles of the Sioux Wars, including the Battle of Little Big Horn.

The Brulé are one of the seven branches or bands of the Teton (Titonwan) Lakota American Indian people. They are known as Sičhą́ǧu Oyáte —Sicangu Oyate—, Sicangu Lakota, or "Burnt Thighs Nation". Learning the meaning of their name, the French called them the Brûlé. The name may have derived from an incident where they were fleeing through a grass fire on the plains.