Abstract: The pneumatic bicycle seat assembly of the present invention has an exterior covering, a bracket being a rod of suitable size bent at the center to form an eye, with each of two leg portions extending rearward in mirror image fashion. A base attaches to and rests on top of the bracket. A pneumatic bladder is a self-enclosed element which is separate from and disposed between the base and the soft, flexible cover. An external valve and a pneumatic pump cooperate to both inflate and deflate the pneumatic bladder.