PROBLEM TO BE SOLVED: To measure the quantity of intimate communication while reducing a possibility of erroneous recognition in a state that psychological resistance is low.SOLUTION: An analysis part 20 acquires a plurality of users heart beat information, and distance information among the plurality of users, respectively, and stores them in a memory. The analysis part 20 measures the quantity of intimate communication among the plurality of users based on the plurality of users heart beat information and the distance information among the plurality of users.