Escalators, which convey many people continuously and efficiently, are getting longer, higher, and deeper with higher utilization of urban spaces, In Japan, most of the escalators have stairs alongside of themselves. The ratio of people who prefer escalators to stairs gets higher as the difference of height between both ends of escalator increases. In this survey, several appropreate places, where no factors except for height are found, are carefully selected as observation points. The flow of ascending pedestrians are video-taped and their number is counted.