Abstract: The present invention is related to a new cushion structure generally comprised of a plurality of spring plates each having respectively mounted thereon a pair of smooth spherical elements. Responsive to an individual sitting on the cushion, the spherical elements in the area where the individual is seated are displaced to cause the spring plates to further incline rearwardly one after another. Through this chain reaction, the spring plates in the area of the individual will all be displaced rearwardly to perfectly fit the curvature of the individual's body who sits thereon. In addition to providing a good ventilation effect, the spring plates which are made of a metal material, also serve to eliminate concentrations of heat in the area where the individual is sitting by virtue of their heat conduction.