An ultrasound diagnostic apparatus comprises: an ultrasound probe including a transducer array a plurality of diagnostic apparatus bodies corresponding to a plurality of parts of the transducer array for transmitting ultrasonic waves through corresponding transducers and processing reception signals from the corresponding transducers, respectively and a synchronizing signal supply unit for supplying a common clock signal and a common trigger signal to the plurality of diagnostic apparatus bodies for causing the plurality of diagnostic apparatus bodies to operate in synchronism.