A xylophone has a frame, multiple spacers, multiple bars, multiple sleeves and multiple fasteners. The frame has two panels and multiple supports. Each support is attached between the two panels and has a top surface and a trough. The trough is longitudinally formed in the top surface of the support. The spacer is mounted in the trough of the support and has multiple protruding mounts. Each bar is mounted between two supports and has two through holes. The sleeves are respectively mounted through the through holes of the bars. Each fastener is mounted through the sleeves and in the protruding mounts of the spacers to fasten the bars on the supports of the frame. Therefore, the spacers are not moved during production for improved production consistency.