An ultrasonic probe that can be used in various stiles depending on cases. The ultrasonic probe includes: plural ultrasonic transducers for transmitting ultrasonic waves according to drive signals, and receiving ultrasonic echoes to output reception signals; a signal processing unit for performing signal processing on the reception signals outputted from the plural ultrasonic transducers to generate a transfer signal; and a communication unit adapted to be connectable to any one of plural functional modules, for transmitting the transfer signal generated by the signal processing unit to the connected functional module.