A probe for an ultrasonic diagnostic apparatus includes a transducer module that transmits and receives ultrasonic waves. The transducer module includes a piezoelectric device transmitting and receiving ultrasonic waves, at least one matching layer disposed on the front surface of the piezoelectric device, a backing layer disposed on the rear surface of the piezoelectric device, a backing block disposed on the rear surface of the backing layer, and a gas layer disposed between the backing layer and the backing block. Acoustic energy proceeding in the backward direction of the piezoelectric device is reflected by the gas layer toward the piezoelectric device.
