The Mozart Knabenchor Wien, also known as the Mozart-Sängerknaben, and known in the English language as the Mozart Boys Choir of Vienna, is an Austrian choir of boys founded in 1956 to commemorate the 200 anniversary of Wolfgang Amadeus Mozart’s birth.

Prof. Erich Schwarzbauer, it’s founder, wanted, primarily, a choir to perform works by Mozart and Viennese traditional music. Unlike the Vienna Boys' Choir, the boys from the Mozart's choir do not live in a boarding school, but they are allowed to go home after musical instruction and attend a school of their choice in his own neighbourhood. Although the members of the choir come together only once a week for rehearsals and performances, the choir has achieved high standards of quality. In 1995 the community ceased activities due to the death of its founder, so that the choir disappeared.

Then, given some legal issues not solved properly the original name of Mozart Sängerknaben could not be in use anymore, so the musical director of the institution Peter Lang took over the responsibility and in collaboration with parents reorganized the choristers under the new name of Amadeus Boys' Choir of Vienna.

In 2006, coinciding with the 250 anniversary of the birth of Mozart, the choir celebrated obtaining its name back, and it is now known again as the Mozart Knabenchor Wien or the Mozart Boys' Choir of Vienna, and it can be clearly distinguished by its 18th knight costume uniform.

It should not be mistaken with the better known Die Wiener Sängerknaben!