An ultrasonic probe includes, a transducer transmitting and receiving ultrasonic waves, and converting ultrasonic signals into voltage signals and vice versa, a first circuit configured to transmit pulse voltage signals to the transducer and receive the voltage signals from the transducer, a second circuit configured to convert the voltage signals received from the first circuit into digital values from analog values, a battery unit configured to supply electric power to the first circuit and the second circuit, and a substrate being provided with the transducer, the first circuit and the second circuit, the first circuit being disposed on a first surface of the substrate, and the second circuit being disposed on a second surface opposite to the first surface of the substrate.
