Provide a small delay delay patterning circuit. An ultrasonic probe having a plurality of circuit units, an adding circuit for adding outputs from a plurality of circuit units, and an input terminal for inputting a common signal to a plurality of circuit units. In this ultrasonic probe, each of the circuit units includes a reception circuit and a transmission circuit connected to the ultrasonic transducer and a first delay circuit. Upon reception of a signal by the ultrasonic transducer, the receiving circuit receives a signal from the ultrasonic transducer, the first delay circuit delays the signal from the receiving circuit, and the signal delayed by the first delay circuit Are added by an adding circuit, and the signal added by the adding circuit is delayed by the second delay circuit. When the signal is transmitted by the ultrasonic transducer, the signal from the input terminal is delayed by the second delay circuit, the signal delayed by the second delay circuit is branched and input to a plurality of circuit units, and the second Delayed by the first delay circuit in each of the plurality of circuit units and inputs the signal delayed by the first delay circuit to the transmission circuit.小面積な遅延整相回路を提供する。 複数の回路単位と、複数の回路単位からの出力を加算する加算回路と、複数の回路単位へ共通の信号を入力する入力端子と、を有する超音波探触子である。この超音波探触子では、回路単位の其々は、超音波振動子に接続される受信回路および送信回路と、第1の遅延回路を備える。超音波振動子での信号の受信時には、超音波振動子からの信号を受信回路が受信し、受信回路からの信号を第1の遅延回路が遅延させ、第1の遅延回路が遅延させた信号を加算回路で加算し、加算回路で加算された信号を第2の遅延回路で遅延させる。超音波振動子での信号の送信時には、入力端子からの信号を第2の遅延回路で遅延させ、第2の遅延回路で遅延させた信号を分岐して複数の回路単位へ入力し、第2の遅延回路で遅延させた信号を、複数の回路単位の其々において第1の遅延回路で遅延させ、第1の遅延回路で遅延させた信号を送信回路に入力する。
