Surmandal or Swarmandal is a string instrument especially used to accompany Bengali singers during concerts. Featured in this video is a man making a Surmandal in Kolkata (Calcutta), West Bengal state of India.

Surmandal is usually used as an accompaniment for Hindustani Classical music. This instrument can be tuned to suit the comfort of the singer. Kolkata is well-known for its traditional music and instruments such as Surmandal, Sitar and Santur also add life to Bengali music.