Manamadurai Balakrishnan Sreenivasan (19 September 1925 – 9 March 1988), or MBS, was a South Indian music director who worked mainly in the Malayalam and Tamil film industries.

He was born to an orthodox Tamil Brahmin family on 19 September 1925 in Chittoor, Andhra Pradesh.

He played a major part in the formation of Indian Peoples Theatre Association (IPTA).

He formed the Madras Youth Choir in 1971, which sings Indian choral music, based at Chennai.

M. B. Sreenivasan died suddenly of a heart attack while conducting a choir in the Lakshadweep islands on 9 March 1988.