An image display apparatus is disclosed. The image display apparatus includes image display apparatus includes: a display; and a signal processing device configured to output data to the display, wherein a first interface in the signal processing device is configured to transmit the data to a second interface in the display by using a plurality of first direction communication lanes, and receive data from the second interface in the display by using at least one second direction communication lane. Accordingly, it is possible to perform data transmission in the direction of the display and data transmission in the direction of the signal processing device, through one cable.