Provided are a dermal adhesive composed of a radiation-curable resin and capable of reducing stuffiness that causes rash or itch, a patch including the dermal adhesive, and a method for producing the dermal adhesive. Also provided is a porous membranous dermal adhesive formed through irradiation of a radiation-curable resin with radiation rays. Further provided is a patch including a base sheet and the dermal adhesive disposed on the base sheet. Still further provided is a method for producing a porous membranous dermal adhesive, the method including applying a dermal adhesive composition containing a radiation-curable resin to an adherend so as to form a porous membranous dermal adhesive, and irradiating the dermal adhesive composition with radiation rays.
