The melodica is a free-reed instrument similar to the pump organ and harmonica. It has a musical keyboard on top, and is played by blowing air through a mouthpiece that fits into a hole in the side of the instrument. Pressing a key opens a hole, allowing air to flow through a reed. The keyboard usually covers two or three octaves. Melodicas are small, light, and portable. They are popular in music education, especially in Asia.

Hohner melodica
Keyboard instrument
Classification Wind; free reed aerophone
Hornbostel–Sachs classification412.132
(Free-reed aerophone)
Playing range
Usually 2 or 3 octaves
Related instruments
accordion, harmonica, pump organ, yu

The modern form of the instrument was invented by Hohner in the 1950s,[1] though similar instruments have been known in Italy since the 19th century.[2]