The object of the present invention is to provide a wet paper web transfer belt having excellent wet paper web transfer properties wherein the paper robbing phenomenon in the press part is prevented, a papermaking system having excellent operational stability comprising said wet paper web transfer belt, a papermaking method having excellent operational stability using said wet paper web transfer belt, and a method for producing said wet paper web transfer belt. This is achieved by a wet paper web transfer belt 1 for transferring a wet paper web; wherein it comprises a wet paper web carrying surface 221 carrying a wet paper web W, which is made of a resin layer 22, and wherein the skewness Rsk of the roughness curve of the wet paper web carrying surface 221 is -0.5 or less.