Nematollah Nassiri was an Iranian military officer who served as the director of SAVAK, the Iranian intelligence agency during the rule of Mohammad Reza Shah Pahlavi, and later the Ambassador of Iran to Pakistan. He was one of the 438 individuals who were arrested and executed in 1979 following the Iranian Revolution.

SAVAK, an acronym of Sāzmān-e Ettelā'āt va Amniyat-e Keshvar, was the secret police of the Imperial State of Iran. It was established in Tehran in 1957 and continued to operate until the Islamic Revolution in 1979, when it was dissolved by Iranian prime minister Shapour Bakhtiar, who was assassinated by the Islamic Republic of Iran in 1991.