Short for the brass family, brass refers to the trumpet/cornet, horn, trombone, euphonium/baritone, and tuba sections of the band. Nearly all of the main characters of Hibike! Euphonium play brass instruments.

Many people wrongly assume that the saxophone is also a brass instrument because of its color, but the saxophone's use of a single reed mouthpiece makes it a woodwind instrument.

A list of the different types of brass instruments can be found here.