Patent ID: 6931228

Claim:
An image-forming apparatus comprising: an image carrier on which a latent image is formed; and a plurality of holders for detachably holding a plurality of developing devices, respectively; said developing devices developing said latent image formed on said image carrier with toner having colors that differ from each other wherein: said image-forming apparatus further comprises: inspecting means capable of performing an inspection of whether or not said developing device is attached to said holder when said inspecting means is arranged in a predetermined relative position in view of each of said holders, and a nonvolatile rewritable storage region in which detachment data indicating an occurrence of detachment of said developing device is stored when said developing device is detached from said holder; and if said detachment data is stored in said storage region when power of said image-forming apparatus is turned ON, said holder and said inspecting means are arranged in said relative position, and inspection is performed of whether or not said developing device is attached.