A portable apparatus for reproducing audio data includes a recording medium on which the audio data is recorded, a reading head for reading the audio data from the recording medium, an acceleration sensor for detecting acceleration, a buffer memory from which the audio data is read after the audio data is once stored therein; and a processor for executing control of retracting the head from the recording medium in a case where a predetermined value of acceleration is detected by the acceleration sensor when the audio data is temporarily stored into the buffer memory from the recording medium.