An ultrasonic transducer module including: a plurality of piezoelectric elements, each being aligned in the same direction that is a longitudinal direction thereof an electrode formed on a surface of each of the piezoelectric elements a wiring member configured to be joined with the electrode and electrically connected with the electrode and a dematching layer provided on a surface of each of the piezoelectric elements, the surface being opposite to another surface of the corresponding piezoelectric element on which the electrode and the wiring member are joined.
