Image forming apparatus

An image forming apparatus includes: an electrophotographic photoreceptor which includes an electroconductive substrate, an undercoat layer which is provided on the electroconductive substrate and has an electrostatic capacitance per unit area of from 2*10 F/cm to 2*10 F/cm , and a photosensitive layer provided on the undercoat layer; a charging unit that charges a surface of the electrophotographic photoreceptor; an electrostatic latent image forming unit that forms an electrostatic latent image on a charged surface of the electrophotographic photoreceptor; a developing unit that develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor by using a developer containing a toner, so as to form a toner image; and a direct transfer type transfer unit that directly transfers the toner image onto a surface of a recording medium. 种图像形成设备，包括：电子照相感光体，其包括导电性基材，设置在导电性基材上并且每单位面积的静电电容为2×10F/cm至2×10F/cm的底涂层，和设置在底涂层上的感光层；充电单元，其对所述电子照相感光体的表面充电；静电潜像形成单元，其在所述电子照相感光体的经充电表面上形