PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus and an ultrasonic image generating method capable of obtaining a clear ultrasonic image without providing a transmission drive device having a high degree of positive/negative drive symmetry. An ultrasonic diagnostic apparatus 1 (1a) according to the present invention transmits a plurality of transmitted ultrasonic waves having different waveforms to a transducer 21 (21a) of an ultrasonic probe 20 (20a) at different times. A plurality of drive signals for transmission are generated, and the drive signals are generated by compensating the asymmetry of the transmission sound pressure waveforms of the plurality of transmission ultrasonic waves transmitted from the transducer 21 (21a). To the transmission unit 12 (12a) that outputs the ultrasonic wave and a reception signal based on the reflected ultrasonic wave that the transmitted ultrasonic wave reflects in the subject, and obtains a plurality of transmitted ultrasonic waves. An image generation unit 14 that extracts a harmonic component based on a plurality of corresponding received signals and that generates an ultrasonic image based on the extracted harmonic component. [Selection diagram] Fig. 3【課題】高度な正負駆動対称性を有する送信駆動装置を備えていなくても、鮮明な超音波画像を得ることができる超音波診断装置および超音波画像生成方法を提供する。【解決手段】本発明に係る超音波診断装置１（１ａ）は、それぞれ波形が異なる複数の送信超音波を、時間をずらして超音波探触子２０（２０ａ）の振動子２１（２１ａ）に送信させるための複数の駆動信号であって、振動子２１（２１ａ）から送信される複数の送信超音波の送信音圧波形の非対称性を補償した駆動信号を生成し、振動子２１（２１ａ）に対して出力する送信部１２（１２ａ）と、送信超音波が被検体内で反射した反射超音波に基づく受信信号を超音波探触子２０（２０ａ）から取得し、複数の送信超音波に対応する複数の受信信号に基づいて高調波成分を抽出し、抽出した高調波成分に基づいて超音波画像を生成する画像生成部１４と、を有する。【選択図】図３
