Image forming apparatus having a supporting device for supporting imaging units

An image forming apparatus comprising:

• a plurality of imaging units each for forming an image on a recording medium, the plurality of imaging units having at least two imaging units integrated into a unit;
• a plurality of image carriers provided in the plurality of imaging units, respectively;
• a plurality of development units each for visualizing an electrostatic latent image on an image carrier by toner, the plurality of developing units being provided in the plurality of imaging units, respectively;
• and
• a toner feeding unit for feeding toner to at least two developing units of the plurality of developing units in the at least two imaging units integrated into the unit, the toner feeding unit being provided separately from the unit,
• wherein the toner feeding unit and the at least two developing units in the at least two imaging units are configured to engage with each other.