Image forming apparatus

An image forming apparatus comprising:

• a developing device configured to
• transport a two-component developer by a transporting unit so that the two-component developer passes through a developing roller, the two-component developer including a toner and a carrier, the two-component developer being stored in a storage chamber provided with a transporting path, the transporting unit rotating in the transporting path, and
• cause a portion of the two-component developer which is being transported by the transporting unit
• to overflow from a discharge port provided at the transporting path, and
• to discharge the two-component developer out of the storage chamber, wherein
• the image forming apparatus has a period in which a first operation is executed, the first operation of reversely rotating the transporting unit at a high speed so that (i) a rotational direction of the transporting unit is an opposite direction to that at a time of development and (ii) a rotational speed of the transporting unit is higher than that at the time of development.