ULTRASONIC TRANSDUCER, MANUFACTURING METHOD FOR ULTRASONIC TRANSDUCER, AND ULTRASONIC ENDOSCOPE

PROBLEM TO BE SOLVED: To provide an ultrasonic transducer capable of broadening the frequency band of emitted ultrasonic waves in a simple and damage proof structure.SOLUTION: The ultrasonic transducer is characterized by including a piezoelectric element 1, an upper electrode 2, an acoustic matching layer 4, a lower electrode 3, an added member 7 including a plurality of columnar parts 7c with the same acoustic impedance not more than that of the piezoelectric element 1 and not less than that of the acoustic matching layer 4, which are arranged at predetermined intervals in a width direction X, a filling material 8 loaded between the plurality of the columnar parts 7c and more flexible than the columnar parts 7c, and a backing material 9.