A mute holder for a music stand includes a mute supporting plate having a plurality of mute supporting through holes for holding mutes, a non-continuous flat bottom edge, and a curved front edge forwardly extended from the flat bottom edge; a locking mechanism having a half-circular locking ring having one end attached on the flat bottom edge of the mute supporting plate and an opposite free end pivotably rotated with respect to the flat bottom edge of the mute supporting plate to lock the free end thereon and to release from the passes supporting plate; wherein the locking mechanism further includes a locking screw passing through the half-circular locking ring and to be biased against the music stand for locking thereon.