A snare drum includes a strainer system which switches the position of a snare wire between an OFF position spaced from a lower drumhead and an ON position in contact with the lower drumhead. The strainer system includes a frame to which the snare wire is attached, and a pair of link mechanisms which are joined to the respective end portions of the frame and attach the respective end portions of the frame to a shell of the snare drum. After switching the position of the snare wire to the ON position, the position of the snare wire with respect to the lower drumhead is adjusted by operating an adjust screw of the second link mechanism.