To provide a mobile terminal device which enables a user to view the television broadcast while the television broadcast is being displayed or the television broadcast is start to be displayed even in the case where the remaining amount of battery is small, and which can perform an action which reflects the user's intention. The mobile terminal device (100) includes: a television broadcast receiving unit (101) which receives a television broadcast signal; a television broadcast processing unit (102) which decodes the stream of the received television broadcast signal; a display conversion unit (103) which converts the decoded YUV signal into an RGB signal on a frame-by-frame basis; a control unit (109) which controls actions of the mobile terminal device in the case where the remaining amount of a battery (112) falls to a predetermined amount or below while the video and audio of the television broadcast is being outputted or in the case where the remaining amount of the battery (112) is the predetermined amount or below at the time when the video and audio of the television broadcast are required to be outputted; and an electric power supply management unit (111) which detects remaining amounts of the battery (112) and notifies the control unit (109) of the remaining amounts of battery for every predetermined time points.