Provided are an ultrasonic diagnostic apparatus and method capable of obtaining an image having a preferable SN and no blur in a wide range from a shallow portion to a deep portion of the image without using a delay control for each transducer. The method includes: a transmission/reception step for transmitting and receiving an ultrasonic wave by focusing to each of a plurality of focus points an image acquisition step for acquiring an ultrasonic image by using the reception signals from the respective focus points and a step for selecting a plurality of transducers for performing transmission and reception with the same transmission/reception frequency from a plurality of transducers for each of the focus points and forming a group of transducers. The transmission/reception step transmits/receives ultrasonic waves by differentiating the transmission/reception phase of at least two transducers belonging to the same group corresponding to the position of each focus point.
