Hollow Horn Bear (Lakota, Matȟó Héȟloǧeča; March 1850 – March 15, 1913) was a Brulé Lakota chief. He fought in many of the battles of the Sioux Wars, including the Battle of Little Big Horn. Later, while serving as police chief of the Rosebud Indian Reservation, he arrested Crow Dog for the murder of Spotted Tail, and later testified in the case of Ex parte Crow Dog, argued before the Supreme Court of the United States. He was the chief Speaker and negotiator for the Lakota, making multiple trips to Washington, D.C. to advocate on their behalf. He later took part in the inaugural parades for both presidents Theodore Roosevelt and Woodrow Wilson. He died of pneumonia in Washington in 1913 after the last of these trips.