When electronic mail is arrived while digital broadcasting is being viewed in a portable receiving terminal (2), a process for automatically opening the electronic mail, or a process for opening the electronic mail according to an instruction by a user is to be carried out. In addition, when the process for opening the electronic mail is thus carried out while a video obtained by receiving broadcast is being displayed, a process for switching to a display screen for an electronic mail content (body text) is not carried out. Instead, the video obtained by receiving broadcast is remained displayed, and the content (body text) obtained as a result of opening the electronic mail, too, is displayed by an OSD function within the same screen (liquid crystal display panel 202).