Process cartridge and image forming apparatus using the same

An image forming apparatus comprising:

• an image forming apparatus main body;
• and
• a process cartridge provided attachably and detachably to and from the image forming apparatus main body, and including an image carrier, a developing unit for visualizing an electrostatic latent image on the image carrier by a processing agent and a toner replenishing unit for replenishing at least a toner to the developing unit, the process cartridge including:
• an image carrier cartridge unitized by including at least the image carrier and positioned and supported by the image forming apparatus main body;
• and a developing cartridge unitized by including at least the developing unit and urged to press to the image carrier cartridge in a state of being positioned relative to the image carrier cartridge, wherein:
• the toner replenishing unit is included in at least either of the image carrier cartridge and the developing cartridge;
• and
• at least a portion of the toner replenishing unit is supported by the image forming apparatus main body.