[Object] To provide an ultrasonic transducer, a diagnostic ultrasonic probe, a surgical instrument, a sheet-type ultrasonic probe, and an electronic apparatus by which both of favorable reflection characteristics and suppression of reverberation at low cost can be achieved.[Solving Means] An ultrasonic transducer for ultrasonic imaging according to the present technology includes a piezoelectric layer, an acoustic attenuation layer, and an acoustic reflection layer. The piezoelectric layer is formed of a piezoelectric material and generates ultrasonic waves. The acoustic attenuation layer is formed of an acoustic attenuation material having an acoustic impedance lower than that of the piezoelectric material. The acoustic reflection layer is arranged on a side of the acoustic attenuation layer and which is formed of an acoustic reflection material having an acoustic impedance higher than that of the acoustic attenuation material, the side being opposite to the piezoelectric layer. The acoustic attenuation layer has a thickness which is integer multiple of ½ of a wavelength of an ultrasonic wave generated in the piezoelectric layer, the wavelength being inside the acoustic attenuation layer.
