There are included a data-processing-unit that selects two or more pieces of data from among a plurality of pieces of first element data or from among a plurality of pieces of first reception data generated by subjecting the pieces of first element data to phasing addition processing and that performs superimposition processing on the two or more pieces of data to generate processed data, an image-generation-unit that generates an acoustic wave image on the basis of the processed data, a setting-information-holding-unit that holds setting information on at least one of a transmitting-unit, a receiving-unit, the data-processing-unit, the-image-generation-unit, and a display-control-unit, and a setting-changing-unit that, in a case where a measurement condition is changed, changes setting of at least one of the transmitting-unit, the receiving-unit, the data-processing-unit, the image-generation-unit, and the display-control-unit on the basis of the held setting information, the setting being related to the aco
