A label attachment device comprising: a label opening unit configured to preliminarily open a tubular label supplied as folded in a sheet; a label expansion unit having openable and closable expansion claws configured to expand the label preliminarily opened by the label opening unit; a lifting unit configured to lift to a label attachment level a mounting on which an attachment target object is mounted, wherein the lifting unit is configured to lift the mounting on which the attachment target object is mounted, thereby inserting the attachment target object into the tubular label expanded by the expansion claws, and label attachment device is configured such that the expansion claws are removed from the label, thereby attaching the label to the attachment target object that is moving along a predetermined movement path; and a pull-up unit configured to pull up the attachment target object after the attachment target object has been inserted into the label, while holding the attachment target object at a label portion of the label, thereby moving the attachment target object to above the label opening unit, so that, while a process after the label opening unit receives the label is executed, the attachment target object to which the label is attached is conveyed above the label opening unit; characterized in that the label attachment device is configured such that the expansion claws are removed from the label after the attachment target object has been inserted into the label, (i) by the pull-up unit being configured to pull up the attachment target object in conjunction with temporarily lifting the mounting on which the attachment target object is mounted, and/or (ii) by the expansion claws being configured to once fall with the attachment target object being mounted on the mounting, while the pull-up unit is configured to hold the attachment target object at the label portion of the label. a label opening unit configured to preliminarily open a tubular label supplied as folded in a sheet; a label expansion unit having openable and closable expansion claws configured to expand the label preliminarily opened by the label opening unit; a lifting unit configured to lift to a label attachment level a mounting on which an attachment target object is mounted, wherein the lifting unit is configured to lift the mounting on which the attachment target object is mounted, thereby inserting the attachment target object into the tubular label expanded by the expansion claws, and label attachment device is configured such that the expansion claws are removed from the label, thereby attaching the label to the attachment target object that is moving along a predetermined movement path; and a pull-up unit configured to pull up the attachment target object after the attachment target object has been inserted into the label, while holding the attachment target object at a label portion of the label, thereby moving the attachment target object to above the label opening unit, so that, while a process after the label opening unit receives the label is executed, the attachment target object to which the label is attached is conveyed above the label opening unit; characterized in that the label attachment device is configured such that the expansion claws are removed from the label after the attachment target object has been inserted into the label, (i) by the pull-up unit being configured to pull up the attachment target object in conjunction with temporarily lifting the mounting on which the attachment target object is mounted, and/or (ii) by the expansion claws being configured to once fall with the attachment target object being mounted on the mounting, while the pull-up unit is configured to hold the attachment target object at the label portion of the label.