An ultrasonic transducer for mounting in an ultrasonic flowmeter for measuring the flow has an electromechanical transducer element for generating ultrasonic signals, a carrier and a housing, the electromechanical transducer element being arranged in the carrier, the housing being formed at least in part of an electroconductive material, the carrier having a carrier material with an acoustic impedance value that lies between the acoustic impedance value of the electromechanical transducer element and the acoustic impedance value of the flowing medium to be measured. To provide an ultrasonic transducer that transmits a high signal portion of the ultrasonic signal into the medium to be measured and simultaneously provides a high operational reliability while being easy to build, the carrier is electroconductive, the carrier and the housing are electroconductively connected to one another and the electromechanical transducer element and the carrier are electroconductively connected to one another.