Arsène Paulin Pujo (December 16, 1861 – December 31, 1939) was a member of the United States House of Representatives best known for chairing the "Pujo Committee", which sought to expose an anticompetitive conspiracy among some of the nation's most powerful financial interests (trusts).

[1] He practiced law in Lake Charles and was a delegate to the state constitutional convention in 1898 before he was elected as a Democrat in 1902.

The Pujo Committee found that a cabal of financial leaders were abusing their public trust to consolidate control over many industries.

Although the coroner charged the Galloway Lumber Company of Grabow, Louisiana with murder for shooting and killing three union strikers on July 7, 1912, the grand jury refused to indict and instead charged 58 union members with first-degree murder.

Pujo helped prosecute 9 but the jury returned a dismissal after 1 hour of deliberation and the remaining defendants were released.