Mansouri first featured for the Algerian national team in a set of friendlies against FC Zürich and ES Troyes in 1999. He received his first official call-up to the national team on 6 November 2001 in a friendly game against France in Paris. He was a member of the Algerian team at the 2002 African Cup of Nations, 2004 African Cup of Nations and 2010 African Cup of Nations, where Algeria finished fourth.