Interfaces are needed for humans and machines to interact with each other. Recently, various interface methods have been used in real life. Especially for those who cannot use the hand, it is not possible to use the hand movement or finger contact-based interface. Therefore, research is needed for user-friendly interfaces for users who are difficult to use by hand. The extended sensory interface described in this paper is an interface that utilizes the heat generated by the convection generated by the user in the exhaled breath. The exhaled breath can be a new invisible hand. And, in this paper, this is expressed as an extended sensation. The exhaled breath towards the surface of things convection causes the surface temperature to rise above the surroundings. By analyzing these temperature differences with a thermal image camera, it is possible to detect traces of conduction heat points due to the extended sensation. Since the traces of conduction heat point is directly generated by the user, it can be utilized for the interface. In this study, we explain the results derived through various experiments and discuss how the extended sensory interface can be utilized by impaired per-son who have difficulty using their hands.