A type of tuba, often used in a marching band, which is named after John Philip Sousa, the famous march composer and conductor.

Today, the sousaphone is a valved brass instrument with the same tube length as other tubas, but shaped differently so that the bell is above the head, the valves are situated directly in front of the musician a few inches above the waist, and most of the weight rests on one shoulder. Thus, the sousaphone can be carried far more easily than a traditional concert tuba, while still retaining the tuba sound. The bell is normally detachable from the instrument body to facilitate transportation and storage.