Fernand-Gustave-Gaston Labori (April 18, 1860 – March 14, 1917) was a French attorney. He was born in Reims and educated at the Faculty of Law of Paris.^[1] In his professional life he defended the accused in some of the most prominent political cases of his day. Among his noted clients was Alfred Dreyfus who was eventually acquitted of treason. During the Dreyfus trial, Labori was the victim of an assassination attempt which hospitalized him for a week and the attacker was never identified.^[2]

Labori was elected second secrétaire de Conférence du barreau de Paris and he was the defence counsel for:

• Anarchist Auguste Vaillant, who threw a bomb into the French Chamber of Deputies, injuring 20 people,^[3] and who was sentenced to death
• Émile Zola in 1898 in the Dreyfus trial
• Captain Alfred Dreyfus at his court martial in Rennes in 1899
• Thérèse Humbert in the case of the Crawford inheritance who pretended to be an heir of American millionaire Robert Crawford; the case sometimes was described as 'the swindle of the century'
• Henriette Caillaux in 1914 who was the wife of former Prime Minister of France Joseph Caillaux

His speeches were regarded as masterpieces of forensic eloquence.^{[citation needed]}

He is buried at the Montparnasse Cemetery.