An ultrasonic transducer, an ultrasonic probe, and an ultrasound image diagnosis apparatus include a plurality of piezoelectric elements arranged in at least one column； individual electrodes provided on at least one surface of top and bottom surfaces of each of the piezoelectric elements； side electrodes extending toward one side surfaces of the piezoelectric elements from the individual electrodes； and a side electrode substrate including wiring lines that are bonded to the one side surfaces of the piezoelectric elements and are electrically connected to the side electrodes, respectively.
