Pressure sensor

A pressure sensor comprising:

• a container;
• a pressure receiving member which constitutes a part of the container and is displaced toward the inner side or the outer side of the container in response to a force;
• a supporting member which extends from a peripheral portion of the pressure receiving member in parallel to the displacement direction of the pressure receiving member, and in which an end portion thereof is bent toward a central portion of the pressure receiving member;
• and
• a pressure sensing device which has a pressure sensing portion and first and second base portions respectively connected to both ends of the pressure sensing portion, in which an arrangement direction of the first and second base portions is parallel to the displacement direction of the pressure receiving member, the first base portion is fixed to a supporting block of the pressure receiving member, and the second base portion is fixed to the supporting member,
• wherein the supporting member and the supporting block include two or more members which are formed of different materials, and the proportion of the lengths of the two or more members is adjusted so that the supporting member and the supporting block have the same thermal expansion coefficient as the pressure sensing device.