To reduce the number of signal lines connecting an ultrasonic probe and an ultrasonic diagnostic apparatus, and to achieve wireless communication by reducing a volume of data of reception signals output from a plurality of ultrasonic transducers.

The ultrasonic probe includes a plurality of the ultrasonic transducers for transmitting ultrasonic waves according to a plurality of drive signals and receiving ultrasonic echoes to output a plurality of the reception signals, a signal processing means for performing orthogonal detection processing or orthogonal sampling processing on the reception signals to generate a complex baseband signal, a sampling means for sampling the complex baseband signal to generate sample data, a serializing means for converting the parallel sample data into serial sample data, and a transmitting means for transmitting the serial sample data.