Abstract: To provide a semiconductive roller which, when being used as a developing roller in combination with a positively chargeable toner, is capable of suppressing adhesion of the toner thereto to suppress reduction of image density, charging the toner to a higher toner charging level to ensure formation of higher-quality images, and suppressing reduction of toner charging level even after continuous repeated image formation to thereby suppress fogging of formed images for a longer period of time. The semiconductive roller (1) is made of a crosslinking product of a rubber composition containing at least an epichlorohydrin rubber and a chloroprene rubber, and has a fluorinated film (5) formed in an outer peripheral surface (4) thereof by treatment with fluorine gas.