A folding apparatus for a combined body of a continuous sheet includes a standing guide member disposed at a predetermined position in a conveying direction, and standing an one end section of the combined body in a width direction by bending a predetermined section of the combined body in the width direction and forming a bent section a folding guide member corresponding to the stood one end section in the conveying direction for folding the stood one end section by laying the one end section towards a section located closer to another side than the one end section in the combined body and a shift-regulating guide member for regulating shifting of the combined body towards the one side in the width direction by coming into contact, from the one side, with the combined body when laying the one end section towards the section located closer to the other side.
