Joos Valgaeren (Dutch pronunciation: [ˈjoːs fɑlˈɣaːrə(n)], born 3 March 1976) is a Belgian former international professional footballer who played as a defender. His former clubs include Club Brugge in Belgium, Roda JC and FC Emmen in the Netherlands, and Celtic in Scotland. His most successful spell was his time at Celtic, where he won three league titles and was part of the side that reached the 2003 UEFA Cup Final. He also played for his country, and was in the Belgian squad for Euro 2000 where he played in all three group games.