An ultrasonic probe apparatus includes an ultrasound transceiver adapted to receive ultrasonic echo signals reflected after transmitting unfocused or defocused ultrasonic signals having a first frame rate； a converter adapted to convert ultrasonic echo signals received by the ultrasound transceiver into digital signals； an image processor adapted to generate a plurality of image data by processing the digital signals； a combiner adapted to combine the plurality of image data having a first frame rate into a plurality of composite image data having a second frame rate； and a transmitter adapted to transmit the plurality of composite image data having the second frame rate.
