Image forming apparatus

An image forming apparatus, comprising:

• an image carrier;
• a charging section which is provided with a charge voltage and charges surface of said image carrier;
• a exposing section for forming an electrostatic latent image on the surface of said image carrier;
• a developing section which is provided with a development voltage and makes developer adhere to said electrostatic latent image formed on said image carrier so as to form a visible image;
• a transferring section to transfer said visible image onto a transfer member;
• a density detecting section to detect a density of said visible image on said transfer member;
• a development voltage setting section to set a development voltage to be provided to said developing section through said density detected by said density detecting section;
• a potential detecting section to detect surface voltage of said visible image;
• a charge voltage setting section to set a difference between said charge voltage provided to said charging section and said development voltage set by said development voltage setting section into a value in a predetermined range on the basis of said surface voltage detected by said potential detecting section;
• and
• an exposure quantity setting section to set an appointed exposure quantity with respect to said charge voltage.