Stress-detecting element, sensor module, and electronic apparatus

A stress-detecting element comprising:

• a support body having an opening part with a first rectilinear section and a second rectilinear section extending parallel to each other;
• a support film disposed over the support body and blocking off the opening part;
• a first piezoelectric element disposed over the support film along the first rectilinear section of the opening part of the support body so as to straddle the first rectilinear section from an interior area of the opening part to an exterior area of the opening part as seen in plan view along a film thickness direction of the support film, the first piezoelectric element being configured and arranged to output an electric signal upon deformation;
• a first elastic part disposed over the support film along the first rectilinear section of the opening part of the support body so as to straddle the first rectilinear section from the interior area of the opening part to the exterior area of the opening part as seen in plan view, the first elastic part having a first elastic end section disposed in the interior area of the opening part as seen in plan view;
• and
• a second elastic part disposed over the support film along the second rectilinear section of the opening part of the support body so as to straddle the second rectilinear section from the interior area of the opening part to the exterior area of the opening part as seen in plan view, the second elastic part having a second elastic end section disposed in the interior area of the opening part as seen in plan view, the second elastic end section being spaced apart from the first elastic end section,
• the first elastic part and the second elastic part being made of synthetic resin, and
• thicknesses of the first elastic part and the second elastic part being greater than thicknesses of the first piezoelectric element and the support film along a normal direction of the support body.