La campana sommersa is an opera in four acts by Italian composer Ottorino Respighi. Its libretto is by Claudio Guastalla, based on the play Die versunkene Glocke by German author Gerhart Hauptmann. The opera's premiere was on November 18, 1927, in Hamburg, Germany. Respighi's regular publisher, Ricordi, was displeased by his choice of subject, and refused to publish the opera. This led to its being published by the German publisher Bote & Bock, and a German premiere.