Achille Marie Joseph Glorieux (2 April 1910 – 27 September 1999) was a French prelate who held diplomatic posts of the Catholic Church.

Achille Marie Joseph Glorieux was born in Roubaix, France, on 2 April 1910, one of ten children born to Achille Glorieux (1883–1965), an industrial leader prominent in the Catholic social movement that promoted large families to fight underpopulation.

While working in Rome at the Secretariat of State, he was also the Vatican correspondent for the French daily La Croix in the 1930s.

[4] Pope John XXIII named him secretary of the commission responsible for planning the Second Vatican Council.

[8] Although Glorieux had neither trained in the traditional manner nor followed the customary career path of a senior Vatican diplomat, Pope Paul appointed him Titular Archbishop of Beverlacum and Apostolic Pro-Nuncio to Syria on 19 September 1969.