| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet processing device and an image forming apparatus capable of stacking a bound sheet bundle without reducing conformity and without impairing quality.SOLUTION: A concave portion 51 is formed on a portion, where a binding needle 1000 is driven in, of a sheet SN forming a surface of at least a side, where the binding needle 1000 is driven in, of a sheet bundle Sa, so that a subsequently sheet bundle discharged to a sheet bundle stacking part can be stacked on a previously sheet bundle stacked on the sheet bundle stacking part without being caught by the binding needle 1000 of the previously stacked sheet bundle. |
