Provided is an ultrasonic imaging apparatus including an ultrasonic probe configured to receive a first ultrasonic signal and a second ultrasonic signal corresponding an object; and an image processor configured to obtain second ultrasonic volume data based on the second ultrasonic signal and relationship information between first information and second information, configured to apply the relationship information to the second ultrasonic volume data and configured to obtain a second ultrasonic cross-sectional image from the second ultrasonic volume data based on the relationship information, where the first information comprises a first position and a first direction corresponding to a position and a direction of the ultrasonic probe receiving the first ultrasonic signal and the second information comprises a second position and a second direction corresponding to a position and a direction of the ultrasonic probe receiving the second ultrasonic signal.