A tom holder includes a fastening piece fixed to a bass drum. A support pipe extends upward from the fastening piece. A support bar extends forward from the support pipe. A mount is supported on the support bar in a manner movable relative to the axis of the support bar. The tom holder further includes a longitudinal position adjustment mechanism for horizontally adjusting the position of side drums attached to the mount. The longitudinal position adjustment mechanism changes the position of the holder with respect to the support bar to adjust the horizontal position of the side drums.