Sensor module and blood pressure measurement device

A sensor module, comprising:

• a sensor portion;
• a sensor base that supports the sensor portion;
• a sensor head cover that is disposed opposite the sensor base and includes an opening at a position opposite the sensor portion;
• and
• a soft portion that covers the sensor portion and is disposed in the opening of the sensor head cover, a boundary portion between the soft portion and the sensor head cover including an outer edge including an edge portion that is inclined or curved, when the sensor module is worn on a living body, with respect to a first direction along a circumferential direction of the living body or a second direction along a longitudinal direction of the living body.

A sensor module, comprising:

• a sensor portion;
• a sensor base that supports the sensor portion;
• a sensor head cover that is disposed opposite the sensor base and includes an opening at a position opposite the sensor portion;
• and
• a soft portion disposed in the opening of the sensor head cover, the soft portion having a polygonal shape that covers the sensor portion and including an engagement projection increasing in width from a corner portion outward.