An electrophotographic apparatus comprising: a cylindrical electrophotographic photosensitive member having a photoconductive layer formed from amorphous silicon; a charging device (1002; 3001; 4001) for charging a surface of the electrophotographic photosensitive member; and an image exposure device for irradiating the surface of the electrophotographic photosensitive member with an image exposure beam to form an electrostatic latent image on the surface of the electrophotographic photosensitive member; characterized in that the electrophotographic apparatus having no unit for controlling a distribution of a surface temperature of the electrophotographic photosensitive member so as to approach a uniform distribution, wherein, the electrophotographic photosensitive member has such a temperature dependence of photosensitive-member characteristics that the photosensitive-member characteristics vary depending on the surface temperature, when the electrophotographic photosensitive member is equally divided into two regions in a cylindrical shaft direction, absolute values of the temperature dependence of the photosensitive-member characteristics in the two regions are not the same, and the electrophotographic photosensitive member is arranged in the electrophotographic apparatus with respect to an airflow structure of air supply and air exhaust in the periphery of the charging device, so that, when, among the two regions, a region which has a smaller absolute value of the temperature dependence of the photosensitive-member characteristics is defined as a first region, and a region which has a larger absolute value of the temperature dependence of the photosensitive-member characteristics is defined as a second region, the change of the surface temperature of the first region becomes larger than the change of the surface temperature of the second region when an image is formed by the electrophotographic apparatus. a cylindrical electrophotographic photosensitive member having a photoconductive layer formed from amorphous silicon; a charging device (1002; 3001; 4001) for charging a surface of the electrophotographic photosensitive member; and an image exposure device for irradiating the surface of the electrophotographic photosensitive member with an image exposure beam to form an electrostatic latent image on the surface of the electrophotographic photosensitive member; characterized in that the electrophotographic apparatus having no unit for controlling a distribution of a surface temperature of the electrophotographic photosensitive member so as to approach a uniform distribution, wherein, the electrophotographic photosensitive member has such a temperature dependence of photosensitive-member characteristics that the photosensitive-member characteristics vary depending on the surface temperature, when the electrophotographic photosensitive member is equally divided into two regions in a cylindrical shaft direction, absolute values of the temperature dependence of the photosensitive-member characteristics in the two regions are not the same, and the electrophotographic photosensitive member is arranged in the electrophotographic apparatus with respect to an airflow structure of air supply and air exhaust in the periphery of the charging device, so that, when, among the two regions, a region which has a smaller absolute value of the temperature dependence of the photosensitive-member characteristics is defined as a first region, and a region which has a larger absolute value of the temperature dependence of the photosensitive-member characteristics is defined as a second region, the change of the surface temperature of the first region becomes larger than the change of the surface temperature of the second region when an image is formed by the electrophotographic apparatus.