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 f 1 . The frequency band of the ultrasound wave transmitted by the transmitting means is set as the first frequency f 1 or higher and 3 times of the first frequency f 1 or lower (f 1 - 3f 1 ). 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 1 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.
