PURPOSE: A nondestructive test device for measuring the ultrasonic attenuation of a concrete structure is provided to improve the accuracy of a test by enabling quantitative measurement of attenuation excluding contact effect between a specimen and a sensor. CONSTITUTION: A nondestructive test device for measuring the ultrasonic attenuation of a concrete structure comprises a generating unit(10) which supplies voltage, a distribution unit(20) which distributes the voltage delivered from the generating unit, a pair of measuring units(30) which are installed on both sides of a specimen to convert the voltage supplied from the distributing unit into ultrasonic wave and measure the attenuation of ultrasonic wave passing through the specimen, and a display unit(40) which is linked with the measuring units and displays values measured by the measuring units.
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