Résumé dans la langue de publication Disclosed are an image-forming apparatus comprising a photosensitive member having a gamma for latent image of 3 or more, electrification means, light exposure means, image development means, image transfer means, cleaning means, and a charge erasing light source, wherein the apparatus further comprises electric field applying means for applying an alternating current electric field at a frequency of 50 Hz to 1 kHz to a portion of the photosensitive member which is excited through light exposure by the charge erasing light source, and an image-forming method utilizing the apparatus. According to the apparatus and the method of the present invention, images with high quality and high resolution can be stably formed without residual images, even when continuous image formation is performed by utilizing a high gamma electrophotographic photosensitive member.