To sound a whistle when one jump and improve the entertaining property by attaching a casing to a handle, a support bar or their connection, arranging liftably a decorative body incorporating a weight in the casing, and connecting the decorative body to a bellows type whistle supporting the decorative body on the casing.

When using a jumping device, if one jumps, holding a handle bar 5 arranged in the upper portion of a support rod 1 by both hands, and placing both feet on a footrest, the weight of the user lowers the footrest, compressing a coil spring. After that, as the reactive force of the coil spring pushes up the footplate, next jumping can be assisted. At this time, when the support rod 1 touches the ground, if the handle bar 5 suddenly stops, a weight 9 incorporated on a decorative neck 10 compresses the bellows portion 8a of a bellows type whistle 8 by the action its descent gravity, air in the interior is spouted, vibrating a reed. Therefore, as the bellows type whistle 8 can be sounded when one jumps on the jumping device, the entertaining property can be improved.