| 摘要 |
A contact transfer member capable of preventing ablation of an image bearing member at a side opposite to a driving side and improving durability of the image bearing member, and an image forming apparatus including the contact transfer member are provided. In the image forming apparatus including a transfer roller (the contract transfer member) having the shape of a rotating member and including an ion-conductive elastic layer contacting a photosensitive member (the image bearing member), and a transfer device for transferring a toner image on the photosensitive member onto a recording material while grasping and conveying the recording material at a transfer nip portion formed between the transfer roller and the photosensitive drum, the outer diameter of the transfer roller at a side opposite to the driving side is made smaller than the outer diameter of the transfer roller at the driving side. It is thereby possible to provide a uniform transfer-nip width in the longitudinal direction of the transfer roller, and to improve durability of the photosensitive drum by preventing ablation of the photosensitive drum at a side opposite to the driving side.
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