| 摘要 |
A fixing device including: a fixing roller; an endless fixing belt which rotates with the fixing roller; a pressure member; a sliding sheet placed between the fixing belt and the pressure member; and a lubricating agent supplying section, a toner image being fixed onto a recording media at a nip portion formed between the fixing roller and the fixing belt, wherein the inner peripheral surface of the fixing belt and a surface of the sliding sheet are formed of polytetrafluoroethylene, wherein the following relation is satisfied: H1≦̸H2, where H1 is a surface hardness of the inner peripheral surface of the fixing belt and H2 is a surface hardness of the sliding sheet facing to the fixing belt.
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