The đàn tranh (Vietnamese: [ɗâːn ʈajŋ̟], 彈箏) or đàn thập lục[1] is a plucked zither of Vietnam, based on the Chinese guzheng, from which are also derived the Japanese koto, the Korean gayageum and ajaeng, the Mongolian yatga, the Sundanese kacapi and the Kazakh jetigen.

It has a long soundbox with the steel strings, movable bridges and tuning pegs positioned on its top.

[2][3] Between the late 15th and the 18th centuries, the number of strings of the đàn tranh increased to fifteen and the instrument was called thập ngũ huyền cầm.

[2] The Vietnamese đàn tranh, the Japanese koto and the Korean gayageum, are descended from Chinese guzheng.

[1] The movable bridges have the shape of the letter V turned upside down, and their sizes varies according to their position: The one for the lowest string is the largest.