[Problem] To provide an ultrasonic wave analyzing device, an ultrasonic wave analyzing method, and an ultrasonic wave analyzing program that can easily adjust the angle of contact of an ultrasonic probe to a subject. [Solution] An ultrasonic wave analyzing device 10 comprising: a control unit 12 that controls an ultrasonic wave source so as to cause an ultrasonic signal to be transmitted from the ultrasonic wave source on a prescribed sound axis toward a plurality of mutually different positions on the surfaces of cartilage or the surfaces of subchondral bone of a subject an echo data input unit 141 that receives the input of echo data of an echo signal formed by the ultrasonic signal transmitted by the control unit being reflected inside the subject a position detection unit 142 that detects the position of the ultrasonic wave source and the positions of the mutually different plurality of cartilage surfaces or subchondral bone surfaces a shape detection unit 143 that detects the shape of the cartilage surface or the subchondral bone surface on the basis of information from each position detected by the position detection unit and an angle calculation unit 144 that calculates the angle formed by the sound axis of the ultrasonic signal and the normal direction of the cartilage surface or the subchondral bone surface at the position where the ultrasonic signal is transmitted.Le problème décrit par la présente invention est de fournir un dispositif danalyse dondes ultrasonores, un procédé danalyse dondes ultrasonores, et un programme danalyse dondes ultrasonores permettant de régler facilement langle de contact dune sonde à ultrasons à un sujet. La solution selon linvention concerne un dispositif danalyse dondes ultrasonores (10), lequel dispisitif comprend : une unité de commande (12) qui commande une source dondes ultrasonores afin damener un signal ultrasonore à être transmis de la source dondes ultrasonores sur un axe sonore prescrit vers une pluralité de position
