| 摘要 |
A sheet feeder for sequentially feeding paper sheets one by one from a tray toward a preselected position, the top paper sheet being first, and an image forming apparatus including the same are disclosed. A friction roller device conveys, among the paper sheets stacked on the tray, upper paper sheets including the top paper sheet toward a separating device. A loosening device faces the leading edges of the paper sheets in the direction of sheet feed for loosing the sheets by sending air toward the leading edges. The top paper sheet on the tray is movable between a feeding position where the friction roller device is capable of conveying the top paper sheet and a loosening position where the loosening device faces the leading edges of the paper sheets.
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