
Jean-Baptiste Bienvenu Martin (22 July 1847 – 10 December 1943) was aFrenchRadical leader and cabinet officer. He was born atSaint-Bris-le-Vineux (Yonne), and was educated in the law.
He held an under prefecture, entered the Council of State, and in 1894 became director under theMinister of the Colonies. He was an unsuccessful senatorial candidate for Yonne in 1897, was elected deputy forAuxerre in that year, was reelected in 1898 and 1902, and in 1905 became Senator for Yonne. In theChamber he supported theWaldeck-Rousseau and theCombes ministries, and advocated the separation of church and state.

In 1904 he became the leader of the newRadical group of theLeft. In 1905-06 he held the portfolio ofPublic Instruction in theRouvier cabinet; he wasMinister of Justice in theDoumergue cabinet in 1913–14, and in the first cabinet organized byRené Viviani in June, 1914; and when theWar in Europe broke out in 1914, he becameMinister of Labor in the secondViviani cabinet, formed August 26 of that year.
He died on December 10, 1943, at Saint-Bris.
| Preceded by | Minister of Justice 1913–1914 | Succeeded by |
| Preceded by | Minister of Justice 1914 | Succeeded by |
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