Electrophotographic image forming device

A tandem type electrophotographic image forming device using an organic photoreceptor obtained by sequentially laminating at least a charge generating layer and a charge transporting layer on a conductive support, the electrophotographic image forming device comprising

• a plurality of image forming units each including at least:
• an electrostatic latent image former that forms an electrostatic latent image on the organic photoreceptor;
• a developer that supplies a toner to the organic photoreceptor and develops the electrostatic latent image to form a toner image;
• a lubricant supplier that supplies a lubricant to a surface of the organic photoreceptor;
• and a cleaner that removes a toner remaining on the surface of the organic photoreceptor with a cleaning blade, wherein
• at least one combination composed of the two adjacent image forming units including toners having different colors satisfies the following formula (1) if a universal hardness of an organic photoreceptor A included in the image forming unit disposed on an upstream side is represented by Ha, and a universal hardness of an organic photoreceptor B included in the image forming unit disposed on a downstream side is represented by Hb.
• [Numerical formula 1]
• Hb−Ha≥10 N/mm2 (1)