As such, in the conventional label openers, the number of locations where the label is adsorbed is limited. Therefore, in order to secure a sufficient adsorption force, it is likely that the adsorption hole will have a large diameter. Here, when the adsorption hole has a large diameter, there is a case in which a portion of the label is sucked into the adsorption hole, leading to a problem that the shape of an opening is not stable and that, due to a gap (leak) formed between the hole and the label, a sufficient suction force cannot be obtained. There may arise another problem that, when opening the label with the label opener, portions of the label that are not adsorbed are difficult to open due to the influence of a vacuum inside the label. These problems occur particularly noticeably in a limp thin label having a small thickness.