A communication device has a first communication interface, a second communication interface, and a third communication interface. The communication device gives priority to communication by the third communication interface in a first period that does not include a period for a process for switching communication by the first communication interface to communication by the second communication interface, even if communication by the first communication interface is underway. The communication device also gives priority to communication by the first communication interface over communication by the third communication interface in a second period that includes the period for the process for switching.