An adhesive material includes a transparent base material having a primer layer formed on one main surface of the base material, and a heat adherent resin layer formed on a surface of the primer layer. The adhesive material is adhered to a surface of a material with the first heat adherent resin layer. The adhesive material can be easily peeled off from the surface material to be sticked. When the base material is peeled off from the surface, confidential information shown on the surface is visible.
