Abstract: A sealing label that includes a first base material, and a second base material which is bonded to one surface of the first base material, and is repeatedly and removably bonded to an opening of a packing container so that the base material seals the opening; the label includes a sealing part which seals the opening; and a support part which is connected with at least one part of the sealing part and bonded to the packing container; wherein the sealing part and the support part has a boundary part, the boundary part has a cut line, wherein the cut line extends in a direction intersecting with a peeling direction to which the sealing part is peeled, the second base material is cut and divided into a proximal area, which is on the proximal side in the peeling direction, and a distal area, which is on the distal side in the peeling direction, by the cut line; and a peeling layer, which releases the first base material from the second base material, is provided between the first base material and the second base