To make original playing and playing making good use of the individuality of a player possible by leaving variations of a plurality of kinds of accompaniment elements constituting an automatic accompaniment to the free discretion of the player.

When reading a plurality of accompaniment elements out of a memory part 6 and playing a automatic accompaniment, a control part 1 reads the accompaniment elements out sequentially and plays them in a playing order set with a reservation switch and an element selection switch of a switch part 4.