To easily maintain the positional accuracy of a photoreceptor drum, a developing sleeve and a cleaning blade, and to unnecessitate measures against a toner leakage when the toner is supplied to the developing sleeve.

The photoreceptor drum 7, the developing sleeve 10b and a developer storing part 10a are held in the integrated cartridge frame body 12 of the process cartridge B, and the cartridge B is provided with a means for electrostatically charging residual toner 101. Since the photoreceptor drum 7 and the developing sleeve 10b are installed in the integrated frame body, the positional accuracy is easily secured, and also, since the toner is recovered to the developing means by the means for electrostatically charging the residual toner 101, the installation of the cleaning blade is unnecessary, and also, the adjustment of the positional accuracy of the cleaning blade is unnecessary.