PROBLEM TO BE SOLVED: To provide ultrasonic diagnostic equipment and an ultrasonic signal processing method which can be achieved with simple processing and which combine a signal band widening with improvement of distance resolution.SOLUTION: The ultrasonic diagnostic equipment comprises: a transmission section 20 which converts a pulsed transmission signal including a fundamental wave component into a transmission ultrasonic wave using an ultrasonic-wave probe 2, then transmits the transmission ultrasonic wave into an analyte； a receiving section 40 which generates a reception signal based on a reflected ultrasonic wave from the analyte received by the ultrasonic wave probe； a separation section 51 which separates from the reception signal, a first component including one or more frequency components and a second component different from the first component； a phase control section 52 which controls a phase of the second component in such a way that a time when an amplitude becomes maximum is equal in the first and second components, to generate a third component； and a synthesizing section 53 which synthesizes the first component and the third component to generate a synthesized reception signal.SELECTED DRAWING: Figure 1【課題】単純な処理によって実現可能であり、かつ、信号の広帯域化と距離分解能の向上を両立させた超音波診断装置および超音波信号処理方法を提供する。【解決手段】超音波探触子２を用いて、基本波成分を含むパルス状の送信信号を送信超音波に変換し前記送信超音波を前記被検体内に送信し、超音波探触子が受信した被検体からの反射超音波に基づいて受信信号を生成し、受信信号から、１以上の周波数成分を含む第１の成分と、第１の成分とは異なる第２の成分とを分離し、第１の成分と前記第２の成分とで振幅が最大となる時刻が同一となるように、第２の成分の位相を制御して第３の成分を生成する位相制御部５２と、第１の成分と第３の成分とを合成し、合成受信信号を生成する。【選択図】図１
