The snare drum or side drum is a percussion instrument with strands of snares made of curled metal wire, metal cable, plastic cable, or gut cords stretched across the drumhead, typically the bottom. Pipe and tabor and some military snare drums often have a second set of snares on the bottom (internal) side of the top (batter) head to make a "brighter" sound. Different types can be found, like Piccolo snares, that have a smaller depth for a higher pitch, rope-tuned snares (Maracatoo snare) and the Brazilian "Tarol", that commonly has snares on the top of the upper drumhead. The snare drum is considered one of the most important drums of the drum kit.
Historically, snare drums have been used in military and parading contexts to produce drum cadences.