Bhoothapandi Arunachalam Chidambaranathan (19 March 1924 – 31 August 2007) was an Indian film score composer and musician who worked mainly in Malayalam films.

Chidambaranath died on 31 August 2007 at his home in Chennai.

He was aged 83 at the time of his death, and was suffering from cancer during his last days.

His wife, Thulasi, whom he married in 1955, died on 25 August 2013, just five days short of her husband's sixth death anniversary.

Rajamani, his son and another famous music director, died on 14 February 2016.