As for the ultrasonic diagnostic device of this invention, being something which gives the electric information to every oscillator inside the ultrasonic probe and the aforementioned ultrasonic probe which the plural ultrasonic oscillators which the ultra wave sending and receiving are done are arranged, the signal processing unit which forms the ultrasonic picture on the basis of the reception section and the aforementioned reception signal which receive the reception signal which can by the transmission of the transmission section and the aforementioned ultrasonic beam which make the ultrasonic beam form which gives the rectangular wave signal which possesses the optional plural frequency components to every aforementioned oscillator and, it has.本発明の超音波診断装置は、超音波を送受信する複数の超音波振動子が配列された超音波探触子と、前記超音波探触子内の振動子毎に電気信号を与えるものであって、任意の複数の周波数成分を有する矩形波信号を前記振動子毎に与える超音波ビームを形成させる送信部と、前記超音波ビームの送信によって得られる受信信号を受信する受信部と、前記受信信号に基づいて超音波画像を形成する信号処理部と、を備える。
