In music, an arpeggio is a group of notes in a chord which are played one after the other, instead of all at the same time. The arpeggio may either go up or go down, but it is more common going up.

The word arpeggio comes from the Italian word arpeggiare, which means "to play on a harp". This is because harps are very good at playing arpeggiated chords.

An arpeggio is a type of broken chord, but there are many different kinds.