To provide a method for bonding a second member with a fixed shape (e.g. crystal glass) to a first member with a flexible and flat configuration (e.g. cloth, leather, and the like) with a hot-melt adhesive in a short process so as to have a high peel resistance and a beautiful appearance, a bonding apparatus and a composition bonded thereby. The bonding method of the present invention comprises the steps of placing a second member with a fixed shape on a first member with a flexible and flat configuration with a hot-melt adhesive being sandwiched therebetween, heating at least the second member up to a temperature equal to or greater than a melting point of the hot-melt adhesive, and cooling the first member and the second member while pressing the second member so as to contact the first member closely.