Patent ID: 7796922

Claim:
An image forming apparatus, comprising: a plurality of toner supplying devices; a plurality of toner containers; and a plurality of developing devices; wherein the plural toner supplying devices supply toners stored in the corresponding toner containers to the corresponding developing devices; and each of the toner supplying devices include a toner tank which stores the toner discharged from the toner container; a toner carrying section which carries the toner stored in the toner tank; a toner dropping route which causes the toner carried by the toner carrying section to drop into the developing device by toner own weight; and a control unit which controls an amount of the toner to flow into the toner dropping route, wherein the control unit includes a magnetic field generating unit for generating a magnetic field in the toner carrying section; and a magnetic substance which is sustained in the toner carrying section by the magnetic field generated by the magnetic field generating unit, wherein an upper portion of the magnetic field generating unit is obliquely disposed at the toner carrying section.