An ultrasonic transducer and a method of manufacturing the same are disclosed. The ultrasonic transducer includes a conductive substrate, a projection which is disposed on the conductive substrate and which forms a cavity therein, a via hole which penetrates the projection and conductive substrate, a first electrode which includes a metal and which fills the via hole, a second electrode which is provided on a bottom of the conductive substrate, a membrane which is provided on the projection and which covers the cavity, and an upper electrode which is provided on the membrane and which contacts the first electrode.