Patent ID: 7925186

Claim:
A developing device comprising: a developing member that forms a toner image on a surface of a toner image carrier holding the toner image; a developer container that holds a developer comprising a toner wherein the developer container includes a partition member that partitions an interior of the developer container into a primary chamber and a secondary chamber, a collected-toner-receiving port through which a collected toner that is collected from the toner image carrier is received into the developer container, and a migration opening through which the developer held in the primary chamber is migratable to the secondary chamber, the migration opening being disposed on the partition member; a developer-conveying unit that is disposed in the primary chamber so as to convey the developer; a capturing unit that is disposed at the migration opening and captures a foreign material which migrates through the migration opening together with the developer; and a foreign-material-removing unit that is disposed at the developer-conveying unit and moves the foreign material that is captured by the capturing unit out of the developer container while the foreign-material-removing unit moves and contacts the capturing unit so as to remove the foreign material.