Wear of the photoreceptor drum can be suppressed, and degradation of image quality of recorded images can be suppressed.When instruction information (image information and control information) for instructing formation of a developed image on a plurality of recording sheets S is inputted, driving of the photoreceptor drum 50, the developing device 52 and the transfer roller 56 is controlled such that formation of the developed image on a plurality of the recording sheets S according to the instruction information is continuously performed, and driving of the photoreceptor drum 50, the developing device 52 or the transfer roller 56 is controlled such that, in the course of the continuous image formation, driving of the photoreceptor drum 50, the developing device 52 or the transfer roller 56 is halted at least once.