Recently, demand of communication robots for supporting human's living has been increasing. And, many researchers focus on a human-robot interactive communication system. However, it is also important to attract the human to the communication before starting the human-robot communication. Therefore, the communication robots need to estimate a direction of the human interest for attracting the
... [Show full abstract] human's attention. In this paper, we propose an estimation method of the direction of the human attention from a monocular camera by using Convolutional Neural Network. Next, we propose an estimation method of the human-interest degree based on the human attention. Finally, we show several experimental results of the proposed method.