provided are a digital television receiver in which a user on a digital television receiver side selects a program from among programs for changing an operation screen , which have undergone push - type distribution by being superposed on a broadcast wave , making it possible to customize a gui by a simple operation , and a gui changing method for the digital television receiver . the digital television receiver of the present invention includes : a television picture signal ; a receiving unit for receiving a program for changing a gui ; an installing unit for selectively installing the program received by the receiving means ; and a changing unit for executing the installed program to change the gui .