A position information common management system for a mobile object includes an information processing apparatus. The information processing apparatus is configured to receive information including position information and metadata as one set wirelessly transmitted from a plurality of position information sources respectively moving along with a plurality of mobile objects. When a request for transmission of position information constituting one set with specified metadata is received from an information terminal, the information processing apparatus is configured to search for a set including the specified metadata among the received sets each including the position information and the metadata. The information processing apparatus is configured to transmit position information of the searched set including the specified metadata and position information to the information terminal.