Strain body and force sensor provided with the strain body

A strain body, comprising:

• a central portion;
• an outer peripheral portion surrounding the central portion;
• connecting portions connecting the central portion and the outer peripheral portion;
• strain sensors provided on main surfaces of the connecting portions;
• reference resistors provided on a main surface of the central portion, and constructing a bridge circuit with the strain sensors;
• an electrode provided on a main surface of the central portion and electrically connected to the strain sensors and the reference resistors to take a detection signal of the bridge circuit;
• a lead wire making electric connection between the electrode and the outside;
• and
• an anisotropic conductive film provided between the electrode and the lead wire to make electric connection between a terminal of the electrode and a terminal of the lead wire.