A lane pricing device configured to determine a toll to be charged to a mobile body for use of a lane constituting a road, the lane pricing device comprising: an observation data acquisition unit configured to acquire at least one of position information of the mobile body measured by the mobile body based on a positioning signal transmitted from a transmission source, and/or a camera image that is acquired by capturing an image from a camera of the mobile body and includes a part of a lane in which the mobile body is moving; a movement information acquisition unit configured to specify, based on at least one of the position information and/or the camera image, a lane in which the mobile body is moving, and acquire lane identification information for identifying a specified lane along with time information indicative of a time when the mobile body moves in the lane; a toll determination unit configured to determine a toll to be charged to the mobile body based on the lane identification information and the time information; an output unit configured to output the determined toll; a movement information acquisition unit configured to collect the lane identification information and the time information acquired from a plurality of mobile bodies along with identification information of each of the mobile bodies; a traffic flow evaluation unit configured to evaluate a traffic flow based on identification information, lane identification information, and information on which time zone a time indicated by time information corresponds to, that are acquired from each of the mobile bodies count the number of records that are present for each mobile body, calculate the average value of the number of records and define the average value of the number of records as a lane traffic flow index; and a dynamic toll control unit configured to evaluate a relativity of lane traffic flow indexes each calculated for each time zone with each mobile body and dynamically control a toll to be charged to each of the mobile bodies determined by the toll determination unit in accordance with the evaluation result of the traffic flow. an observation data acquisition unit configured to acquire at least one of position information of the mobile body measured by the mobile body based on a positioning signal transmitted from a transmission source, and/or a camera image that is acquired by capturing an image from a camera of the mobile body and includes a part of a lane in which the mobile body is moving; a movement information acquisition unit configured to specify, based on at least one of the position information and/or the camera image, a lane in which the mobile body is moving, and acquire lane identification information for identifying a specified lane along with time information indicative of a time when the mobile body moves in the lane; a toll determination unit configured to determine a toll to be charged to the mobile body based on the lane identification information and the time information; an output unit configured to output the determined toll; a movement information acquisition unit configured to collect the lane identification information and the time information acquired from a plurality of mobile bodies along with identification information of each of the mobile bodies; a traffic flow evaluation unit configured to evaluate a traffic flow based on identification information, lane identification information, and information on which time zone a time indicated by time information corresponds to, that are acquired from each of the mobile bodies count the number of records that are present for each mobile body, calculate the average value of the number of records and define the average value of the number of records as a lane traffic flow index; and a dynamic toll control unit configured to evaluate a relativity of lane traffic flow indexes each calculated for each time zone with each mobile body and dynamically control a toll to be charged to each of the mobile bodies determined by the toll determination unit in accordance with the evaluation result of the traffic flow.