Patent ID: 8150299

Claim:
An image forming apparatus, comprising: plural developing devices that develop electrostatic latent images formed on image bearing members; plural toner cartridges that store toners to be fed to the plural developing devices and have toner discharging ports, at least one of the plural toner cartridges having a size larger than that of the other plural toner cartridges and the plural toner cartridges being arranged such that the toner discharging ports are adjacent to one another at a first interval smaller than an arrangement pitch of the plural developing devices; and plural sub-hoppers that respectively have toner receiving ports formed in positions opposed to the toner discharging ports of the plural toner cartridges and have toner supply ports for feeding the toners to the plural developing devices, the plural sub-hoppers being arranged such that the toner supply ports are adjacent to one another at a second interval same as the arrangement pitch of the plural developing devices.