Sensor sheet and manufacturing method of sensor sheet

A sensor sheet (18) comprising an insulating sheet (24), a first electrode sheet (25), a first bonding part (36), a second electrode sheet (26), and a second bonding part (37), wherein

• the insulating sheet (24) has a first surface (27) and a second surface (28) and is formed of a foamed body,
• the first electrode sheet (25), which is conductive, is disposed on a first surface side of the insulating sheet and has first openings (34a) penetrating through the first electrode sheet (25),
• the first bonding part (36) bonds the insulating sheet and the first electrode sheet to each other,
• the second electrode sheet (26), which is conductive, is disposed on a second surface side of the insulating sheet and has second openings (34b) penetrating through the second electrode sheet (26), and
• the second bonding part (37) bonds the insulating sheet and the second electrode sheet to each other, wherein
• the first electrode sheet and the second electrode sheet are conductive cloths woven with a plurality of filament assemblies (72),
• the plurality of filament assemblies comprise a plurality of filaments (71) and a plating layer (33) formed on at least a part of a surface of the filament,
• the first electrode sheet comprises the first openings that are opened between the plurality of filament assemblies,
• the second electrode sheet comprises the second openings that are opened between the plurality of filament assemblies,
• the sensor sheet is configured not to have a yield point showing a local maximum value in a range with a strain being 0.5 to 10% in a stress-strain curve in a tensile test,
• an opening ratio, which is a ratio of an opening area of the first openings to an area of the first electrode sheet, is 1% or more and 50% or less, and
• an opening ratio, which is a ratio of an opening area of the second openings to an area of the second electrode sheet, is 1% or more and 50% or less.