The present invention provides an ultrasound inspection device, an ultrasound image data generation method, and a computer-readable recording medium in which is stored a program, which determine for each of data calculation points whether or not the distance to a transmission focal point is with a predetermined range, and when the distance from the data calculation point to the transmission focal point is outside the predetermined range, superimposition of a plurality of first element data is carried out assuming an ultrasonic beam to be a convergent wave, and when the distance from the data calculation point to the transmission focal point is within the predetermined range, the superimposition of the plurality of first element data is carried out assuming an ultrasonic beam to be a planar wave to thereby generate second element data corresponding to the data calculation points.
