Image forming device

An image forming device comprising:

• a plurality of photoreceptors;
• a device main body;
• and
• an intermediate transfer unit attachable to and detachable from the device main body by being inserted into and removed from the device main body in an insertion and removal direction,
• wherein the intermediate transfer unit includes
• an intermediate transfer belt stretched across a plurality of rollers,
• a color transfer roller and a monochrome transfer roller that are disposed along an inner periphery of the intermediate transfer belt and, when oscillated, press and cause the intermediate transfer belt to abut against each corresponding photoreceptor of the plurality of photoreceptors,
• a lever operated by a user, and
• a monochrome oscillation mechanism that oscillates the monochrome transfer roller,
• the intermediate transfer belt is switchable between a color image forming state of abutting against all of the corresponding photoreceptors, a monochrome image forming state of abutting against a photoreceptor of the plurality of photoreceptors corresponding to the monochrome transfer roller, and a separated state of being separated from all of the plurality of photoreceptors,
• the monochrome oscillation mechanism switches between the monochrome image forming state and the separated state when the lever is operated, and
• the device main body is provided with a regulator that regulates removal of the intermediate transfer unit in the monochrome image forming state.