A mobile station is provided. The mobile station includes: a wireless communication unit which establishes wireless communication with a base station; a storage unit which stores a roaming list used when roaming to a mobile communication network other than a specific mobile communication network; a communication network selecting unit which selects a mobile communication network with which the mobile station is capable of communicating wirelessly, by using the roaming list; and an update unit which requests update of the roaming list through the wireless communication unit at a time of starting the mobile station, and updates the roaming list stored in the storage unit if changed.