Carlo Pietro Tagliabue (January 13, 1898, in Mariano Comense – April 5, 1978, in Monza) was an Italian baritone.

Around age 17 he began two years' study of music and singing under Corrado Mattioli, a teacher and director of the choral division of the Civiche Scuole popolari di Musica in Milan.

After a brief conscription during World War I, he returned to Milan and studied for one year with Leopoldo Gennai—a repertoire coach from La Scala—and Annibale Ghidotti, a blind singing teacher who, it was said, could identify a student's voice type simply by feeling their throat.

His debuts in Genoa (1923), Torino, La Scala (1930), Rome (1931), and Naples (1931) were all in Tristan und Isolde (sung in Italian).

In his book Voci Parallele Giacomo Lauri-Volpi wrote, "[Tagliabue] is the only survivor of a school that knows that in Rigoletto, in Ballo in Maschera, Trovatore, Traviata a melodramatic piece should be sung, measured and breathed musically in line with the mastery of great art."