The feed roller 11 is, as described above, pressed against the stack of the sheets which are under the pressure generated by the pressure plate 16 and rotationally driven to feed the topmost sheet 2 of the stacked sheets 2 by frictional force, so that the feed roller 11 may preferably be formed of a rubber such as EPDM (ethylenepropyleneterpolymer) having a relatively high coefficient of friction,