A transfer belt that contains carbon black A, that is acidic carbon black having a pH value of not more than 6 or basic carbon black having a pH value of not less than 8; resin B, that is a polymer capable of serving as an electron-pair donator or as an electron-pair acceptor with respect to carbon black A; and resin C, that is a polymer which neither serves as an electron-pair donator, nor serves as an electron-pair acceptor, with respect to carbon black A, and a full color image-forming apparatus, comprising the above transfer belt, and and a full color image-forming apparatus equipped with the belt.