In order to provide a highly flexible and more highly sensitive ultrathin sheet for a pressure sensor, a pressure sensor, and a method for producing the sheet for a pressure sensor, a pressure sensor sheet (10) of the present invention is provided with a first electrode sheet (1a), a second electrode sheet (1b), and a flocculent pressure-sensitive conductive layer (3) composed of tangled conductive fibers (2) which is disposed between the first electrode sheet (1a) and the second electrode sheet (1b) and undergoes a change in resistance value when compressed, wherein the conductive fibers (2) extend along a direction parallel to the two electrode sheets and are stacked in a perpendicular direction, and the conductive fibers that constitute the pressure-sensitive conductive layer have spaces provided therebetween.