Person number detection device and elevator

The present invention relates to a nose count apparatus and an elevator. Because the prior nose count counts noses according to the load bearing weight variation number and direction, it can not count if the weight variation is not linear stepped. In addition, the prior nose count has no mention to the precision of the present people. A measurement unit (11) measures the data used in the nose count. A passage presumption unit (12) presumes the number of passages. A passage existence presumption unit (13) presumes the passage existence in the enclosed space according to the measured data. A present passage presumption unit (14) resets the present passage to 0, when the existence presumption result is no; and presumes the present passage in the enclosed space according to a formula, {(the number of present passages before opening the door)+(the presumption result of passages taking on the elevator)-(the presumption result of passages taking off the elevator)}, when nonexistence existence presumption result is y