A portable sound device includes: a main body having an audio output unit holder; an audio output unit detachably mountable in the audio output unit holder and configured to output audio; an audio cable coupled to the audio output unit and configured to transmit an audio signal to the audio output unit, one end of the audio cable located outside the main body and the other end of the audio cable located inside the main body; and a rotary module rotatably mounted in the main body and configured to wind or unwind the audio cable according to a rotational direction of the rotary module.