Slightly above a rupture-intended line, a peripheral surface of a projection portion of a stopper cap is pushed in a direction from an outer side to an inner side (in an arrow direction). The stopper cap is pushed over on the principle of leverage in an oblique direction with, as a fulcrum P, the side (the back side) opposite in a circumferential direction to the side (the near side) at which a pushing force PW acts, so that an intermittent portion is ruptured due to bending of the flexible stopper cap. Then, a residual area remains at the syringe side, and a separation area is separated together with the stopper cap from the syringe to perform unsealing. Thus, a syringe label which allows for easy unsealing along the intermittent portion and with which an unsealed state is easily confirmed, and a drug solution-filled syringe using the label, are provided.
