An ultrasound imaging device, which can extract nonlinear components efficiently and improve the ultrasound penetration, is provided. The receiving means has a given reception band 74, and the lower limit frequency of the reception band 74 is the first frequency fi. The frequency band of the ultrasound wave transmitted by the transmitting means is set as the first frequency fi or higher and 3 times of the first frequency fx or lower (fi - 3fi) . When the ultrasound wave in such band is transmitted, the low-frequency harmonic component 72 of the nonlinear component may have higher frequency than the first frequency f i and therefore can be received by the receiving means Also, as most of the high-frequency harmonic components 73 can be generated in the reception band 74, most of the high-frequency harmonic components 73 can be received.
