A packing system, comprising: a transporting device for transporting a packing material and a packing target object provided on the packing material; an erecting device including a pair of parts, which are placed near an end of the transporting device and are spaced apart from each other, the erecting device being configured to allow width-directional both sides of the packing material entered into the transporting device to be transported in a direction perpendicularly crossing a transportation direction of the packing material and in a standing manner; a guiding device for allowing the width-direction both sides of the packing material transported by the transporting device to become closer to each other and for guiding the packing material to be folded and packed toward a top surface of the packing target object; and a sidepoint positioning device for pressing one and opposite side portions of the packing material, which are moved toward each other during passing through the guiding device, and allowing the one and opposite side portions of the packing material to pass therethrough in a direction of the packing material transported by the transporting device; characterized in that the sidepoint positioning device comprises: a pair of first rollers configured to rotate in opposite directions, with the one side portion of the packing material interposed therebetween, thereby allowing the packing material to pass therethrough; a pair of second rollers configured to rotate in opposite directions, with the opposite side portion of the packing material interposed therebetween, thereby allowing the packing material to pass therethrough; and a detection part configured to sense positions of the one and opposite sides of the packing material passing through the first roller and the second roller, thereby allowing the one side or the opposite side of the packing material to be tightened or loosened by the first roller or the second roller. a transporting device for transporting a packing material and a packing target object provided on the packing material; an erecting device including a pair of parts, which are placed near an end of the transporting device and are spaced apart from each other, the erecting device being configured to allow width-directional both sides of the packing material entered into the transporting device to be transported in a direction perpendicularly crossing a transportation direction of the packing material and in a standing manner; a guiding device for allowing the width-direction both sides of the packing material transported by the transporting device to become closer to each other and for guiding the packing material to be folded and packed toward a top surface of the packing target object; and a sidepoint positioning device for pressing one and opposite side portions of the packing material, which are moved toward each other during passing through the guiding device, and allowing the one and opposite side portions of the packing material to pass therethrough in a direction of the packing material transported by the transporting device; characterized in that the sidepoint positioning device comprises: a pair of first rollers configured to rotate in opposite directions, with the one side portion of the packing material interposed therebetween, thereby allowing the packing material to pass therethrough; a pair of second rollers configured to rotate in opposite directions, with the opposite side portion of the packing material interposed therebetween, thereby allowing the packing material to pass therethrough; and a detection part configured to sense positions of the one and opposite sides of the packing material passing through the first roller and the second roller, thereby allowing the one side or the opposite side of the packing material to be tightened or loosened by the first roller or the second roller.