A method for loading a folded sheet bundle provided from a sheet bundle provider with a folded edge of the folded sheet bundle in the lead, including: supporting an undersurface of the folded sheet bundle so that the folded edge is lower than a trailing edge of the folded sheet bundle by a hill, the hill including a slope between a folded edge support and the sheet bundle provider, the hill further including a valley wall declined steeper than the slope from the higher side to the lower side between the slope and the folded edge support; supporting the folded edge of the folded sheet bundle by the folded edge support; and moving the folded edge support without rotation in a direction declined from a higher side near the sheet bundle provider to a lower side farther from the sheet bundle provider than the higher side.