PROBLEM TO BE SOLVED: To provide a material derived from an edible natural material, which has a good usability when attached to the skin, hardly causes a peeling residue when peeled from the skin, and is derived from an edible natural material. A sheet-shaped electrode structure including a conductive pressure-sensitive adhesive layer made of a material, a pressure-sensitive adhesive forming composition preferably used for forming the pressure-sensitive adhesive layer in the electrode structure, and the pressure-sensitive adhesive forming composition. To provide a crosslinked product of a polysaccharide suitable as a sticky component in a product and a method for producing the above-mentioned pressure-sensitive adhesive forming composition. SOLUTION: In a sheet-shaped electrode structure, a crosslinked product of a polysaccharide having a branched structure is contained in a conductive pressure-sensitive adhesive layer, and the above-mentioned crosslinked product retains an electrolyte in the pressure-sensitive adhesive layer. [Selection diagram] Fig. 5【課題】可食性の天然材料に由来する材料からなり、皮膚に貼り付けた場合に使用感が良好であり、皮膚から剥離された場合の剥離残を生じさせにくく、可食性の天然材由来の材料からなる導電性の粘着剤層を備える、シート状の電極構造体と、当該電極構造体における粘着剤層の形成に好適に使用される粘着剤形成用組成物と、当該粘着剤形成用組成物における粘着性の成分として好適な多糖の架橋物と、前述の粘着剤形成用組成物の製造方法を提供すること。【解決手段】シート状の電極構造体において、導電性の粘着剤層に分岐構造を有する多糖類の架橋物を含有させ、粘着剤層において前述の架橋物に電解質を保持させる。【選択図】図５
