An ultrasonic metering device having two ultrasonic transducers, each having an ultrasonic conversion element and a wedge for holding the conversion element, mounted on a pair of mounting members which are adapted to be mounted on a pipe in which a fluid to be measured flows. The mounting members clamp the pipe with first end portions of the mounting members being hingedly coupled to each other. Tightening means is provided for coupling opposite free end portions of the mounting members which have clamped the pipe to thereby fixedly secure the mounting members to the pipe.