Salvador Seguí i Rubinat (23 September 1887, in Lleida – 10 March 1923, in Barcelona), known as El noi del sucre ("the sugar boy" in Catalan) for his habit of eating the sugar cubes served him with his coffee, was a Catalan anarcho-syndicalist in the Confederación Nacional del Trabajo (CNT), a Spanish confederation of anarcho-syndicalist labor unions.

While he was General Secretary in Catalonia, the CNT played a major role in the ''La Canadenca'' strike, which lasted for 44 days, which paralyzed 70% of the Catalan economy, and which led to Spain being the first country in the world to establish the 8-hour working day by law.

[3] Together with Ángel Pestaña, Seguí opposed the paramilitary actions advocated and carried out by other members of the CNT.

[4] On 10 March 1923, while completing preparations to promote the idea of emancipation as a form of social empowerment among workers, he was assassinated by gunshot on Carrer de la Cadena, in Barcelona's Raval District, at the hands of gunmen working for the Catalan employers' organisation under protection of Catalonia's Civil Governor, Martínez Anido.

He has received many tributes since his death, and a foundation has been launched in his memory, the Fundación Salvador Seguí,[7] based in Barcelona, Madrid and Valencia.