Patent ID: 8761617

Claim:
An image forming apparatus comprising: a motor configured to rotate a toner bottle to convey toner from the toner bottle to a toner storage unit; a rotating state-detecting unit configured to detect a rotating state of said motor; a toner presence-detecting unit configured to detect whether or not toner is present in said toner storage unit; a toner bottle replacement-detecting unit configured to detect that there is a possibility that said toner bottle has been replaced; and a control unit configured to be operable when it is detected by said toner presence-detecting unit that the toner is out, and further it is detected by said toner bottle replacement-detecting unit that there is a possibility that said toner bottle has been replaced, to drive said motor rotate said tonner bottle and determine timing in which image formation is to be first started, after toner bottle replacement, based on the rotating state of said motor detected by said rotating state-detecting unit.