Saroj Dutta (March 13, 1914 – August 5, 1971) popularly known comrade SD, was an Indian communist intellectual and poet, active in the Naxalite movement in West Bengal in the 1960s.

In 1964 he joined the Communist Party of India (Marxist), CPI(M), and was an editor of their paper, Swadhinata, along with Sushital Ray Chowdhary.

[5] Attracted to a more radical form of revolutionary Marxism, he along with Sushital Ray Chowdhury and some other Calcutta intellectuals, supported the Charu Majumdar-led Naxalbari uprising in May 1967.

In April 1969, he was also one of the founder members of Communist Party of India (Marxist–Leninist), CPI (ML), an organisation which was outlawed a year later[6] for conducting armed guerrilla warfare targeted at the landlords and the police.

In 1977, after the CPI(M) returned to power with a Left-front majority, many Naxalite sympathisers[9] signed on a petition seeking an investigation of Saroj Dutta's death.