Saifoulaye Diallo (1 July 1923 – 25 September 1981) was a Guinean politician, lawmaker and cabinet member.

While working as a civil servant in French West Africa, he was also a trade union activist, causing him to frequently move.

As a member of the African Democratic Rally (RDA), he served in the National Assembly of France from 1956 to 1958.

Diallo was the political secretary of the ruling Democratic Party of Guinea – African Democratic Rally (PDG-RDA) and, after President Ahmed Sékou Touré, the de facto number-two statesman during the first five years of the Republic of Guinea.

In January 1963 he entered the government, where he would serve as Minister of State, at various points responsible for finance and planning.