Patent ID: 8032067

Claim:
A circular body, which is used for an image forming apparatus employing an electrophotographic system, the circular body comprising: at least an inner layer containing resin and an outer layer that is laminated on an outer circumferential surface side of the inner layer and contains resin; and as a conductive agent, polyaniline in the outer layer and carbon black in the inner layer, and satisfying the following relational expressions (1) and (2): 13.0≦C1≦15.0 (1) 21.5≦C2≦25.0 (2), wherein C 1 represents the content (parts by weight) of the polyaniline based on 100 parts by weight of the resin forming the outer layer, and C 2 represents the content (parts by weight) of the carbon black based on 100 parts by weight of the resin forming the inner layer.