Pressure sensor

A pressure sensor, comprising:

• a pressure receiver having:
• a diaphragm portion that is deformed by receiving pressure on a pressure receiving surface thereof;
• and a rim portion that is formed around and integrally with the diaphragm portion and formed to be thicker than the diaphragm portion;
• and
• a semiconductor substrate that is connected to a reverse surface of the pressure receiving surface and detects strain in the diaphragm portion, wherein
• the pressure receiver is formed of ceramic,
• the semiconductor substrate has:
• a base portion provided to face the reverse surface;
• and a connected portion that protrudes from the base portion toward the reverse surface and has a connected surface connected to the reverse surface,
• at least one resonating strain gauge has been provided on the semiconductor substrate, and
• the connected portion has an area smaller than an area of the base portion in a case where the pressure sensor is viewed from a direction perpendicular to the reverse surface.