<;P>;PROBLEM TO BE SOLVED: To provide a method of producing an adhesive composition for an adhesive plaster, which is carried out by formulating a liquid component to an adhesive of an acrylic polymer, where the composition has good compatibility of the acrylic polymer with the liquid component, together with good adhesion to the skin, generating no stimulation to the skin. <;P>;SOLUTION: An acrylic oligomer formed by polymerizing at least one alkyl acrylate or alkyl methacrylate having 4-10C alkyl and having a prescribed number average molecular weight, is used as the liquid component. <;P>;COPYRIGHT: (C)2011,JPO&INPIT