Image forming apparatus having integral toner supply cartridge and toner recovery cartridge

An image forming apparatus comprising:

• developing means for developing a latent image formed on an image carrying body with a developing agent;
• transferring means for transferring the image developed by the developing means to a recording medium;
• removing means for removing the developing agent remaining on the image carrying body after transfer of the developed image by the transferring means;
• convey means for conveying the developed agent removed by the removing means;
• storing means for storing the developing agent removed by the removing means;
• supply means for supplying the developing agent to the developing means;
• a first unit having the developing means and the convey means;
• a second unit detachably mountable to the first unit, the second unit having the storing means and the supply means,
• a developing agent introducing section, provided in the first unit, for introducing the developing agent into one end portion side of the developing means;
• a developing agent discharging section, provided in the first unit, for discharging to the outside the developing agent conveyed by the convey means;
• a developing agent supply port provided in the supply means of the second unit and connected to the developing agent introducing section of the first unit;
• and
• a developing agent receiving port provided in the storing means of the second unit and connected to the developing agent discharging section of the first unit,
• wherein the developing agent supply port and the developing agent receiving port of the second unit are connected/disconnected to/from the developing agent introducing section and the developing agent discharging section, in accordance with the connection/disconnection of the second unit to/from the first unit.