Kouxian (Chinese: 口弦; pinyin: kǒuxián; lit.

'mouth string') is a general Chinese term for any variety of jaw harp.

The jaw harp is a plucked idiophone in which the lamella is mounted in a small frame, and the player's open mouth serves as a resonance chamber.

Chinese jaw harps may comprise multiple idiophones that are lashed together at one end and spread in a fan formation.

[1] Modern kouxian with three or more idiophones might be tuned to the first few tones of the minor pentatonic scale.