Methods of making articles, adhesive compositions, and expandable adhesive sheets

[Problems] to provide a method for manufacturing an article that can improve adhesive strength, and an adhesive composition and a foam adhesive sheet used for the same. [Solution] a method for manufacturing an article includes an adhesion step of disposing a thermosetting resin and a foaming agent that is a thermally expandable microcapsule between a first member and a second member, heating and foam-curing an adhesive composition, and bonding the first member and the second member, When the slope of the tangential line drawn at the peak apex to the curve on the long-time side of the peak is a, the time of the peak apex is T1, the slope of the tangential line drawn at the peak apex to the curve on the long-time side of the exothermic peak in the heat flow-time curve is B, and the time of the peak apex is T2, A < B and...