Much information can generally be obtained from sight. However, it is difficult for visually impaired people to obtain information from the visual sense. Currently, Braille displays capable of acquiring information from tactile sensing have been developed and commercialized. However, they are large, heavy, and not suitable for carrying. Thus, to overcome these problems, we have developed a Braille unit composed of two moving belts, and all Braille characters can be displayed by independently positioning each belt. This paper reports the contact determination method of fingertip for the belt-driven Braille unit, which is necessary to continuously display serial Braille characters corresponding to the up/down of fingertip．