To solve the problem wherein, since an ultrasonic wave is managed only by a sound pressure, and a frequency in liquid cannot be confirmed in a conventional ultrasonic measuring device, it cannot be confirmed whether an ultrasonic wave having a sound pressure and a frequency determined by maker guaranteed values is generated from an ultrasonic transmission source of an ultrasonic cleaning device or not.

This ultrasonic measuring device is characterized by being equipped with a detection part 0101 for detecting an ultrasonic vibration in liquid, a conversion part 0102 for performing piezoelectric conversion of the detected ultrasonic vibration, an acquisition part 0103 for acquiring a sound pressure value and a frequency from a converted voltage value, and a display part 0104 for displaying the acquired sound pressure value and frequency.