| 摘要 |
An image forming apparatus that includes a discharge tray on which a sheet discharged from a discharge port is stacked; a sheet retainer, which guides the sheet discharged from the discharge port onto the discharge tray and is displaced in abutment against an uppermost sheet stacked on the discharge tray, the sheet retainer removing electricity of the sheet; and a detection unit, which detects a stack of the sheet on the discharge tray on a basis of a position of the sheet retainer.
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