Abstract: A pressure transducer includes a semiconductor diaphragm of a predetermined conductivity having a strain sensitive region capable of being elastically deformed by means of the external pressure applied thereto, a fixing region having a high degree of rigidity, central and peripheral strain sensitive elements disposed along the crystallographic directions thereof and exhibiting high sensitivity and which are respectively insulatingly disposed within the vicinity of the central and peripheral portions of the strain sensitive region of the diaphragm, lead portions insulatingly disposed upon the diaphragm and extending from the strain sensitive region to one side of an end portion in the fixing region for transmitting electrical signals from the sensitive elements, the leads being connected to the central and peripheral strain sensitive elements at one end thereof in order to collectively form a bridge circuit, and electrodes respectively provided upon the other end portions of the lead portions and within the en