A belt unit is detachably mountable in an image-forming apparatus. The belt unit includes: at least two rollers, each having a roller shaft; an endless belt looped around the two rollers; and an outer frame disposed around the endless belt and having two roller-supporting walls rotatably supporting the rollers therebetween, the roller shafts of the rollers extending in a direction intersecting the roller-supporting walls.

 
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< Cleaning device, process cartridge, and image forming apparatus that include a blade that is pressed against a surface of a rotating member at a surface pressure of 2.0 MPa or more

> Fixing device and image forming apparatus using the same

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