A pressure sensor 11 is provided with a connecter housing 30 having a pressure sensing element 20 arranged on an end surface thereof, a sensor housing 40 constructed to have the connecter housing 30 inserted thereinto, a pressure chamber 452 defined between the end surface of the connecter housing 30 and the sensor housing 40, and a compensation circuit 21 for performing the processing and operation of a measured signal of the pressure sensing element 20 to output the measured signal. The compensation circuit 21 is composed of a data communication interface section 211 for receiving the compensation data radio-transmitted thereto, a memory section 212 for storing the compensation data, a compensation data writing section 214 for taking thereinto the compensation data from the data communication interface section 211 and for writing the compensation data in the memory section 212, and a signal processing section 213 for performing the processing and operation of the measured signal based on the compensation data stored in the memory section 212.