To sufficiently straighten curl without generating jam on a rolled sheet with a compact mechanism when correcting curl of the rolled sheet.

A rolled sheet feeding mechanism comprises a paper feed roller 130 capable of unwinding an end on the outer winding side of a rolled sheet 30 from a paper feed port 111b and conveying it, and a curl straightening means 140 capable of correcting curl of the rolled sheet 30 conveyed by the paper feed roller 130. The curl correcting means 140 comprises a U-shaped inversion guide 141 for inverting the rolled sheet 30 in the direction opposite to the direction of the curl of the rolled sheet 30, a correcting roller 142 arranged with a space on the inner side of a U-shape of the inversion guide 141, and a driving means for driving the straightening roller 142 in the conveying direction of the rolled sheet 30 between the inversion guide 141 and the correcting roller 142.