PROBLEM TO BE SOLVED: To facilitate the acquisition of uniform and high-quality ultrasound images in a range from shallow to deep sites.SOLUTION: An ultrasound image diagnostic apparatus S comprises: a transmitter 12 for driving an ultrasound probe 2 with driving signal and making the ultrasound probe 2 transmit a transmission ultrasound wave which has a wave train length equivalent to or more than 1.5 waveforms of a lower limit frequency component in a -6 dB transmission bandwidth of the ultrasound probe, 6 or less of standard deviation of signal intensity of frequency components in the -6 dB transmission bandwidth, and -8 [dB] or more of signal intensity of the lower limit frequency component in the -6 dB transmission bandwidth, standardized with the maximum intensity being 0 [dB]； a receiver 13 for receiving a reception signal from the ultrasound probe 2； and an image generator 14 for generating ultrasound image data based on the harmonic components of the reception signal obtained by transmitting the transmission ultrasound wave.SELECTED DRAWING: Figure 2【課題】浅部から深部まで均一性及び画質の高い超音波画像を容易に得ることである。【解決手段】超音波画像診断装置Ｓは、駆動信号を用いて超音波探触子２を駆動し、波連長が前記超音波探触子の送信－６ｄＢ帯域の下限周波数成分の１．５波相当以上であり、送信－６ｄＢ帯域内の周波数成分の信号強度の標準偏差が６以下であり、最大強度を０［ｄＢ］として規格化した送信－６ｄＢ帯域の下限周波数成分の信号強度が－８［ｄＢ］以上である送信超音波を超音波探触子２に送信させる送信部１２と、超音波探触子２から受信信号を受信する受信部１３と、前記送信超音波を送信することより得られた受信信号の高調波成分に基づいて超音波画像データを生成する画像生成部１４と、を備える。【選択図】図２
