Baishan, Spanish name Cuchillo Negro, was a Tchihende (Mimbres) Apache chieftain, of the Warm Springs Apache Band during the 1830s to 1850s.

The Apache are several Southern Athabaskan language–speaking peoples of the Southwest, the Southern Plains and Northern Mexico. They are linguistically related to the Navajo. They migrated from the Athabascan homelands in the north into the Southwest between 1000 and 1500 CE.