The Santoor is an Indian stringed musical instrument. It is related to the Indian shata-tantri veena of earlier times and has strong resemblances with the Persian santur. It is a trapezoid-shaped hammered dulcimer often made of walnut, with seventy strings. The special-shaped mallets (mezrab) are lightweight and are held between the index and middle fingers. A typical santoor has two sets of bridges, providing a range of three octaves.

The Kashmiri santoor is more rectangular and can have more strings than the original Persian counterpart, which generally has 72 strings. The santoor as used in Kashmiri classical music is played with a pair of curved mallets made of walnut wood and the resultant melodies are similar to the music of the harp, harpsichord or piano. The sound chamber is also made of walnut wood and the bridges are made of local wood and painted dark like ebony. The strings are made of steel.

Santoor is an Indian instrument and later spread to several regions of Asia.

"Santoor" was used as an accompaniment instrument to the Folk music of Kashmir. It was a 100 stringed instrument played in a style of music known as the Sufiana Mausiqi. The Sufi mystics used it as an accompaniment to their hymns.

The Original Sanskrit name of Santoor was "Shata Tantri Veena" meaning a lute or a stringed instrument that has over hundred strings. Santoor is a Persian name to this same instrument "Shata Tantri Veena" that has references back to Vedic literature.