A tom-tom supporting device includes a bracket, a first arm having a plurality of first supporting portions for supporting an upper hoop, and a second arm having a second supporting portion for supporting a lower hoop. Two of the first supporting portions provided at ends of the first arm are each located near one of two intersection points at which a diameter of a batter head, which is perpendicular to a vertical plane containing an axis of a shell and an axis of the second arm, intersects the upper hoop.