Abstract: Ergonomic Bicycle Seat With Prostate Guard (ERGOSEAT) is an ergonomically designed sitting device for making bicycle riding more comfortable for men and women suffering from loss of blood circulation and loss of sensation at their sexual organs, and from pain at their wrists, as they ride on conventional bicycle seats. The invention creates an air space, Prostate Guard, between the sensitive area of the body and the conventional bicycle seat by eliminating the third forward contact point and by substituting a new contact point, Frontal Support of ERGOSEAT, on lower abdomen. For maintaining proper positioning of the body over the two rear contact points, Bladder Cushions of ERGOSEAT, the Frontal Support arrests forward slide of the body and serves to reduce strain on both arms and wrist. ERGOSEAT is adjustable to fit all body sizes and weights and does not require special details and implements for fastening the Seat to the seat column of the standard bicycle frame.