Abstract: A process for producing an adhesive type heat-generation according to the present invention comprises an adhesive layer forming process 30 and a heating composition filling and the adhesive layer gathering process 60. In the adhesive layer forming process, the hydrous hydrophilic adhesive layer is spread and sandwiched between a release film and a base film while continuously feeding the release film and the base film from respective rolls to form the adhesive layer. In the heating composition filling and the adhesive layer gathering process 60, the base film is placed on the air-permeable film at its one side opposite to the adhesive layer, peripheral edges of the films are melt-bonded to form a heat-sealed peripheral edge and thus to form a pocket between the base film and the air-permeable film for containing the heating composition. At the same time, an adhesive of the adhesive layer is pushed and gathered inside the heat-sealed peripheral edge.

Abstract: A heat-generating body which can constitute a adhesive portion by, as a main component, a water-containing hydrophilic gel agent obtained from a hydrophilic polymeric thickening agent and has an excellent heat-generating performance due to scarce transfer of moisture between a heat-generating portion and the adhesive portion is provided. The heat-generating body has the heat-generating portion formed by sealing a heat-generating composition causing an exothermic reaction in the presence of air in an air-permeable container in desired form such as bag form or sheet form and the adhesive portion formed by, as a main component, the water-containing hydrophilic gel agent obtained from a hydrophilic polymeric thickening agent and is characterized in that a difference between critical moisture values of the heat-generating portion and the adhesive portion is allowed to be 5% or less.