An ultrasound diagnostic apparatus includes a channel selector for selecting channels that are simultaneously available for reception from a plurality of channels of a transducer array, and a controller for controlling a transmission driver to sequentially transmit a plurality of ultrasonic beams having different frequencies corresponding to a plurality of measuring depth regions from the transducer array, controlling reception signal processors and an image producer to form a same frame by receiving ultrasonic echoes having a frequency corresponding to each of the plurality of measuring depth regions, and controlling the channel selector to increasingly reduce the number of channels simultaneously available for reception as a measuring depth in the plurality of measuring depth regions decreases.
