The present invention relates to an ultrasonic transducer, an ultrasonic probe, and an ultrasonic examination device. The ultrasonic probe includes a substrate, a supporting film, and a piezoelectric element. The substrate includes an opening. The supporting film is configured on the substrate to cover the opening. The piezoelectric element is configured at a part of the supporting film. The part overlaps with the opening in a planar view in a thickness direction of the substrate. A thickness of the part of at a center of gravity in the planar view is smaller than a thickness between the part on the supporting film and an outer edge portion connected with the opening.