The present application is directed to a muting device for muting the sound of musical instruments such as wind instruments, and more particularly, flutes. The muting device is configured to mute the sound of a wind instrument by restricting the airflow through the blowhole of the wind instrument without changing the pitch of the sound produced by the wind instrument. The muting device may restrict the airflow through the blowhole of the wind instrument by means of a woven or knitted mesh fabric placed over the blowhole of the wind instrument.