A blowout includes: a stretchable body having a tube shape and changeable in shape a wire body having elasticity and arranged along the longitudinal directions of the stretchable body a pipe body having a cylinder shape, one end part of the pipe body being connected to one end part of the stretchable body and a mouthpiece body having a cylinder shape and connected to the other end part of the pipe body, the mouthpiece body being held by a user in the mouth such that air is blown by the user, in which the stretchable body is stretched by blowing air from the mouthpiece body while the stretchable body is curled into a spiral by the elastic force of the wire body when air is not blown from the mouthpiece body. In the blowout, the one end part of the stretchable body and the one end part of the pipe body are connected by a tightening band so that the stretchable body can be attached to and detached from the pipe body.
