Black Knife

Black Knife, Blackknife, or black knife may refer to:


 * Black Knife, Spanish name Dangerous Negro, Baishan (c. 1816 – 1857), a Chihenne (Mimbres) Apache chieftain involved in the Apache Wars.
 * Sgian-dubh ("black knife" or "hidden knife"), singled-edged knife, part of traditional Scottish Highland dress
 * Blackknife, a model of Modulus Guitars