In order to provide an ultrasonic diagnostic apparatus with a transceiver circuit configuration which has a small number of components and is suitable for miniaturization, an amplifier circuit used for both transmission and reception which can be built in an ultrasonic probe and has a function of adding currents of received signals from plural elements is provided in the ultrasonic diagnostic apparatus. In addition, an analog matrix switch (402) for arbitrarily adding received signals from plural transducers is provided. That is, a transmitted and received signal amplifier circuit is shared by using a transceiver circuit section, which is formed by an FET element serving as a source follower circuit, as a gate-grounded amplifier during a signal reception period. The received signals from the transducers which have been amplified by FET elements can be added for each group of arbitrary elements by the matrix current switch (402) formed by plural FET elements corresponding to the respective transducers.
