We have been developing a new television system named Free Viewpoint Television (FTV) that can generate free views. We propose a new user interface of FTV using an automultiscopic display (multi-viewing autostereoscopic display) and a head tracking system. We made a head tracking system which used cameras and didn't need to attach any sensors to a person. We succeeded to extend the viewing zone of an automultiscopic display. It brought us to interface with FTV naturally.