The position detection device for detecting a position of a moving body in a predetermined environment, which includes a reception feature quantity generation unit 41 which obtains, from a base station which is disposed in the environment and receives identification information transmitted by radio communication from a mobile station attached to the moving body and a reference station disposed in each area defined in advance in the environment, the identification information and a reception intensity as of the reception of the identification information to generate a reception feature quantity which correlates the reception intensity related to each of the mobile station and the reference station with the base station, a position reception feature quantity generation unit 43 which generates a reception feature quantity of each area from the reception feature quantity related to the reference station taking into consideration a factor of a difference caused between generated reception feature quantities related to the mobile station and the reference station, a position reception feature quantity storage unit 45 which learns a generated reception feature quantity of each area and records the quantity together with position identification information, and a position determination unit 46 which searches the position reception feature quantity storage unit for a reception feature quantity most proximate to the generated reception feature quantity related to the mobile station and outputs corresponding position identification information as a position detection result.