A ultrasound imaging device is provided to efficiently extract non-linear components to improve penetration. A receiving means has a prescribed receiving band width (74), the lower limit frequency of which is a first frequency (f1). A transmitting means transmits ultrasound, the frequency band width of which is set to be not less than the first frequency f1 but not larger than three times the first frequency (f1): (f1-3f1). Since transmission of ultrasound with this band width causes a difference component (72) in the non-linear components to have a frequency that is not less than the first frequency (f1), the receiving means can receive the difference component (72). Further, since a major part of a chord component (73) can be caused in a receiving band width (74), the receiving means can receive the major part of the chord component (73).