Provided is a treatment tool capable of reliably treating not only ingrown nail wounds near the tip of nails but also ingrown nail wounds near the base of nails and also capable of immediately relieving pain from ingrown nail wounds. This adhesive plaster structure 1 is applied to a finger along a side edge of the nail and has: a wound adhesion area 2 having a flexible surface 2A for adhesion to wounds； and a guide area 3 having a slide groove 3A that receives the side edge of the nail and is capable of sliding in the nail longitudinal direction along the side edge of the nail. The slide groove 3A extends in the longitudinal direction of the adhesive plaster structure 1, across at least part of the distance between the tip and the rear end of the adhesive plaster structure 1. The adhesive plaster structure 1 is characterized by the flexible surface 2A for adhesion to wounds being guided to the position of the ingrown nail wound, when the adhesive plaster structure 1 is applied to the finger.
