Disclosed is a method for displaying an ultrasonic image. The method for displaying an ultrasonic image includes the steps of: reading an ultrasonic image stored in a storage medium based on a user input displaying the ultrasonic image and TGC information matched with the ultrasonic image on a screen receiving an input of changing the TGC information by controlling at least one TGC value corresponding to at least one depth value included in the TGC information and renewing the ultrasonic image according to the changed TGC information.COPYRIGHT KIPO 2016