Der Rauchfangkehrer, oder Die Unentbehrlichen Verräther ihrer Herrschaften aus Eigennutz (The Chimney Sweep, or The Indispensable Betrayers of Their Lordships out of Self-interest) is an opera in three acts by Antonio Salieri to a German libretto by Leopold Auenbrugger.

Originally designated as a Musikalisches Lustspiel (musical comedy), the work has the characteristics of both a German Singspiel and an Italian opera buffa.

Fräule Nannette (Cavalieri) sings brilliant showpiece arias in her quest for Volpino's love, notably "Wenn dem Adler das Gefieder", and Herr von Bär (Fischer) consistently exhibits his ursine qualities by going down to E2 and D2 his two arias.

[2] Setting: The rich mansion of Frau von Habicht during the late 1800s, located in a German capital city.

Volpino accomplishes this task by enamoring Frau von Habicht and Fraule Nannette through music, later persuading the noblemen, who are wooing the ladies, to provide him money in order to disenchant the women.