Provided is an ultrasound inspection apparatus ensuring the real-time property during ultrasound imaging, reducing the data amount to be stored, and making sound speed value correction after the imaging to allow improvement in image quality, tissue characterization, and so forth with high accuracy. The ultrasound inspection apparatus includes: a first reception signal memory storing element data; an image producer adapted to perform phasing and adding on element data based on a specified sound speed value to produce a sound ray signal, and produce ultrasound image data; a sound speed determiner adapted to determine the optimum sound speed value from a plurality of pieces of ultrasound image data produced using element data; a storage necessity determiner adapted to determine element data whether or not to satisfy a specified condition; and a second reception signal memory storing the element data as determined to satisfy the specified condition.