A music piece reproduction device comprises a recording section (12) for recording a plurality of music piece data each possessing a sound data file and a beat guide file containing information on the sound data file, and a control section (1) for controlling so as to connect the sound data files recorded in the recording section (12), using a predetermined method. A command comment, indicating what kind of editing is capable of being performed and at which position in the music piece, is added to the beat guide file, and the control section successively reproduces a preceding music piece and a subsequence music piece based on the command comments of these two music pieces.