Image Forming Device

An image forming device configured to form an image on a sheet in an electrophotographic method, comprising:

• a fixing roller configured to rotate in contact with the sheet and thermally fix a developer image transferred onto the sheet while feeding the sheet;
• a driving unit configured to generate a driving force;
• a first rotating body configured to be driven by the driving force generated by the driving unit and rotate the fixing roller;
• a clutch mechanism provided on a power transmission route on which the driving force is transmitted from the driving unit to the first rotating body, the clutch mechanism being configured to switch between a state to transmit the driving force to the first rotating body and a state to block transmission of the driving force to the first rotating body;
• a second rotating body provided on a downstream side route as a route at a downstream side relative to the clutch mechanism on the power transmission route, the second rotating body being configured to rotate in conjunction with the first rotating body;
• and
• a detecting unit configured to detect whether the second rotating body is rotating.