One of the daily activity of proboscis monkey (Nasalis larvatus Wurmb) is the movement and migration to find feeding and rest area. Information about the movement activities of proboscis monkey is very important for conservation management at Bakut Island that is a habitat of proboscis monkeys for increasing population and sustainability of the proboscis monkey. This research using focal animal sampling method that wass combined with the concentration counting techniques. The movement activity increased at 06:00-13:00 and 16:00 for feeding and rest. Daily range of proboscis monkey ranged 490-1095 m and the average of 831 m. Factors that affecting the variations of daily range was availability of feeding resources and social interaction. Keywords: range distance, movement activity. proboscis monkey