Disclosed is a device for outputting display data information displayed on a display section as audio of a portable telephone, comprising: an audio output key for selecting an audio output mode of the portable telephone; a memory for storing the data displayed on the display section of the portable telephone; an audio memory for storing an audio data corresponding to the audio output mode of the portable telephone; an audio processing section adapted to modulate an audio signal inputted from a microphone for conversion to an audio data, and demodulate an audio data inputted from an RF processing section and the audio data stored in the audio memory to an audio signal to output the demodulated audio signal as voice to the outside through a speaker; and a control section adapted to read out the data displayed in the display section from the memory and the audio data corresponding to a selected audio output mode from the audio memory, respectively, when a predetermined audio output mode is selected by manipulation of the audio output key to control the data read out from the memory and the audio data read out from the audio memory so that the audio data is outputted as voice to the outside through the audio processing section.