A pressure sensor includes a pressure sensing element and a pressure receiver. The pressure sensing element includes a pressure sensing portion and a pair of base portions connected to both ends of the pressure sensing portion. The pressure receiver has a first main surface that is a pressure receiving surface and a second main surface that is a back side of the pressure receiving surface. The pressure receiver includes a pair of supporting portions provided on the second main surface. The pair of supporting portions cover one main surface of the pressure sensing element and support the pair of base portions of the pressure sensing element. The pressure receiver has a thick portion in a position symmetrical with respect to at least one of a first virtual line passing through a center of the second main surface and extending in a direction of an arrangement of the pair of supporting portions and a second virtual line passing through the center and extending in a direction perpendicular to the first virtual line.