Jozef Willem Haazen[1] (born 24 December 1944) is a Flemish musician and carillonneur.

Haazen studied at the Royal Conservatoire Antwerp in Antwerp and the Royal Carillon School "Jef Denyn" in Mechelen, Belgium.

In 1981, he resigned to become the city carillonneur of Mechelen and the director of the Royal Carillon School "Jef Denyn", following the previous director's retirement.

[2] During his tenure, he oversaw the creation of the Queen Fabiola Competition[3] Haazen remained the director until 2010.

With the Universal Esperanto Association, Haazen worked on an international project to modify the Universal Declaration of Human Rights to define and include "human obligations".