Electrically conductive composition, sheet-form flexible electrode using same, and method for producing said electrode

This electrically conductive composition includes a thermoplastic elastomer and flaky graphite, the melt viscosity of the thermoplastic elastomer at 200° C. in a low-shear zone with a shear rate of 60 sto 200 sbeing 50 Pa·s to 1400 Pa·s, and the roundness of the flaky graphite being 0.5 or less. This method for producing a sheet-form flexible electrode has a kneading step for kneading expanded graphite and a thermoplastic elastomer having a melt viscosity of 50 Pa·s to 1400 Pa·s at 200° C. in a low-shear zone with a shear rate of 60 sto 200 s−to produce the electrically conductive composition, and a molding step for molding the electrically conductive composition into the form of a sheet by injection molding or extrusion molding.