| 摘要 |
A belt unit is provided with an endless belt, a pair of rollers around which the endless belt is wound, and a regulating member having a flange surface provided at one axial end of at least one of the pair of rollers. The flange surface extends on an outer side with respect to an outer surface of the endless belt wound around the pair of rollers, the flange surface is configured to contact an end, in a width direction, of the endless belt to prevent the endless belt from moving obliquely, and the flange surface is formed with a conical surface which is configured such that a portion closer to a peripheral side of the conical surface is closer to an axial center of the at least one of the pair of rollers.
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