To provide a belt that prevents an increase with time in slide resistance against and wear with time of a slide member.SOLUTION: A belt has a resin layer including polyimide and a siloxane-modified resin on an outermost surface layer on a side sliding at least with a slide member, and the ratio of the molar quantity of a siloxane structure in the siloxane-modified resin is 20 mole percent or more.SELECTED DRAWING: Figure 1

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