Abstract: A sheet-shaped flexible electrode includes a thermoplastic elastomer including a styrene-based thermoplastic elastomer or including a styrene-based thermoplastic elastomer and an olefin-based thermoplastic elastomer, and a conductive material containing carbon black, and has a thickness of 50 ?m or more and 500 ?m or less. The melt viscosity of the thermoplastic elastomer at 200° C. in a low shear region with a shear rate of 60 s?1 or more and 200 s?1 or less is 100 Pa·s or more and 800 Pa·s or less, and is four times or less the melt viscosity of the thermoplastic elastomer at the same temperature in a high shear region with a shear rate of 1000 s?1 or more and 1220 s?1 or less. An amount of DBP absorbed by the carbon black is 300 cm3/100 g or more.

Abstract: A capacitive coupling sensor (1) is equipped with a sensor unit (10) which has: a detection electrode layer (11) which generates capacitance between the detection electrode layer (11) and a detection target, a shield electrode layer (12), and an insulation layer (13) which is arranged between the detection electrode layer (11) and the shield electrode layer (12), wherein the insulation layer (13) has a cross-linked polymer obtained by cross-linking of a thermoplastic polymer. The capacitive coupling sensor (1) has high heat resistance, can be made thinner, and has an excellent tactile quality.