Abstract: The present invention provides a quick exhaust device including: a first rod fixed at one end thereof to an inner lower portion or an inner intermediate portion of the exhaust window and mounted at the other end thereof so as to be upwardly inclined in a direction of being directed toward the inner surface of the exhaust window; a piston rod hingedly fixed at an upper end thereof to the other end of the first rod so as to be directed upwardly; a cylinder coupled to a lower portion of the piston rod so as to be directed upwardly to allow the piston rod to be withdrawn upwardly from the cylinder; and a first bracket fixed at one end thereof to the inner side of the wall at a lower portion of the exhaust port and hingedly fixed at the other end thereof to a lower portion of the cylinder.