The present invention provides an ultrasound bone evaluation device, comprising: brackets (11, 12) arranged in pairs facing each other and having ultrasonic vibrators respectively, and means for moving at least one of the brackets (movable bracket (12) A moving mechanism (6), a distance measuring unit (8) for measuring a distance between the ultrasonic vibrators, and a time measuring unit (controller (15)) for measuring an ultrasonic propagation time between the above ultrasonic vibrators . The holder (12) is moved by the moving mechanism (6), thereby clamping the subject, measuring the distance between the ultrasonic vibrators and the ultrasonic propagation time between the ultrasonic vibrators at this time, and calculating the bone density of the subject from these measured values. The speed of sound is evaluated. A temperature measurement unit (9) is provided for measuring or estimating the temperature of the subject in a state sandwiched by the holder. The obtained sound velocity in the bone of the subject is corrected based on the temperature of the subject obtained by the temperature measuring unit (9). As a result, accurate measurement can be performed without deviation.