Provision of a pressure measuring device having a flexible membrane that receives the pressure; a pedestal, provided with a raised portion having a bottom face that is circular that supports the flexible membrane; and a supporting member that is bonded to the circular bottom face of the raised portion. The flexible membrane is made out of, for example, silicon, and has the (100) face as the primary face. Moreover, the flexible membrane is provided held between a silicon substrate, which is provided with a recessed portion, and a silicon substrate, which is provided with a recessed portion. Because of this, the flexible membrane is held on the pedestal with the silicon substrate interposed therebetween.